diff --git a/config/urls.py b/config/urls.py
index b8864b067..b2df25c41 100644
--- a/config/urls.py
+++ b/config/urls.py
@@ -6,14 +6,16 @@
 from django.views.generic import TemplateView
 from drf_spectacular.views import SpectacularAPIView, SpectacularSwaggerView
 from rest_framework.authtoken.views import obtain_auth_token
+
 from scoap3.exports.views import get_exports
+
 urlpatterns = [
     path("", TemplateView.as_view(template_name="pages/home.html"), name="home"),
     path(
         "about/", TemplateView.as_view(template_name="pages/about.html"), name="about"
     ),
     # Django Admin, use {% url 'admin:index' %}
-    path(settings.ADMIN_URL+"tools/", get_exports, name="admin_tools"),
+    path(settings.ADMIN_URL + "tools/", get_exports, name="admin_tools"),
     path(settings.ADMIN_URL, admin.site.urls),
     # User management
     path("users/", include("scoap3.users.urls", namespace="users")),
diff --git a/scoap3/articles/api/views.py b/scoap3/articles/api/views.py
index 33ec9794a..29332e8c8 100644
--- a/scoap3/articles/api/views.py
+++ b/scoap3/articles/api/views.py
@@ -88,6 +88,7 @@ class ArticleDocumentView(BaseDocumentViewSet):
                 LOOKUP_QUERY_IN,
             ],
         },
+        "country": "authors.affiliations.country.name",
     }
 
     faceted_search_fields = {
@@ -104,6 +105,11 @@ class ArticleDocumentView(BaseDocumentViewSet):
             "facet": TermsFacet,
             "enabled": True,
         },
+        "country": {
+            "field": "authors.affiliations.country.name",
+            "facet": TermsFacet,
+            "enabled": True,
+        },
     }
 
     def get_serializer_class(self):
diff --git a/scoap3/articles/documents.py b/scoap3/articles/documents.py
index 026852584..92ebdb02f 100644
--- a/scoap3/articles/documents.py
+++ b/scoap3/articles/documents.py
@@ -62,15 +62,15 @@ class ArticleDocument(Document):
         }
     )
 
-    authors = fields.NestedField(
+    authors = fields.ObjectField(
         properties={
             "first_name": fields.TextField(),
             "last_name": fields.TextField(),
-            "affiliations": fields.NestedField(
+            "affiliations": fields.ObjectField(
                 properties={
                     "value": fields.TextField(),
                     "organization": fields.TextField(),
-                    "country": fields.NestedField(
+                    "country": fields.ObjectField(
                         properties={
                             "code": fields.TextField(),
                             "name": fields.KeywordField(),
diff --git a/scoap3/exports/forms.py b/scoap3/exports/forms.py
index 05b90c3c8..9264eb784 100644
--- a/scoap3/exports/forms.py
+++ b/scoap3/exports/forms.py
@@ -5,6 +5,7 @@ class AffiliationExportForm(forms.Form):
     country_code = forms.CharField(label="Country", required=True, max_length=4)
     year = forms.IntegerField(label="Year", required=True)
 
+
 class AuthorExportForm(forms.Form):
     country_code = forms.CharField(label="Country", required=True, max_length=4)
-    year = forms.IntegerField(label="Year", required=True)
\ No newline at end of file
+    year = forms.IntegerField(label="Year", required=True)
diff --git a/scoap3/exports/views.py b/scoap3/exports/views.py
index bbcc686ec..4dbf11633 100644
--- a/scoap3/exports/views.py
+++ b/scoap3/exports/views.py
@@ -1,30 +1,33 @@
-from django.http import HttpResponse
-from django.shortcuts import render
-from django.contrib import messages
 import csv
 import datetime
 
+from django.contrib import messages
+from django.http import HttpResponse
+from django.shortcuts import render
+
 from scoap3.utils.tools import affiliation_export, author_export
 
 from .forms import AffiliationExportForm, AuthorExportForm
 
+
 def generate_csv_response(data, action_name, write_header=True):
     response = HttpResponse(
         content_type="text/csv",
         headers={
-            "Content-Disposition": \
-                f'attachment; filename="scoap3_{action_name}_{datetime.datetime.now()}.csv"'},
+            "Content-Disposition": f'attachment; filename="scoap3_{action_name}_{datetime.datetime.now()}.csv"'
+        },
     )
 
     writer = csv.writer(response)
     if write_header:
-        writer.writerow(data.get('header'))
+        writer.writerow(data.get("header"))
     print(data)
-    for row in data.get('data', []):
+    for row in data.get("data", []):
         writer.writerow(row)
 
     return response
 
+
 def get_exports(request):
     action_name = None
     if "affiliation_export" in request.POST:
@@ -41,18 +44,22 @@ def get_exports(request):
     if action_name and request.method == "POST":
         try:
             if "affiliation_export" in request.POST and affiliation_form.is_valid():
-                year= affiliation_form.data.get('year')
-                country= affiliation_form.data.get('country_code')
+                year = affiliation_form.data.get("year")
+                country = affiliation_form.data.get("country_code")
                 result = affiliation_export(year or None, country or None)
             if "author_export" in request.POST and author_form.is_valid():
-                year= author_form.data.get('year')
-                country= author_form.data.get('country_code')
+                year = author_form.data.get("year")
+                country = author_form.data.get("country_code")
                 result = author_export(year or None, country or None)
 
             response = generate_csv_response(result, action_name)
 
             return response
         except Exception as ex:
-            messages.error(request, f'There was an error: {ex}')
+            messages.error(request, f"There was an error: {ex}")
 
-    return render(request, "admin/tools.html", {"affiliation_form": affiliation_form, "author_form": author_form})
\ No newline at end of file
+    return render(
+        request,
+        "admin/tools.html",
+        {"affiliation_form": affiliation_form, "author_form": author_form},
+    )
diff --git a/scoap3/templates/admin/index.html b/scoap3/templates/admin/index.html
index 0d8c95882..0441509b1 100644
--- a/scoap3/templates/admin/index.html
+++ b/scoap3/templates/admin/index.html
@@ -14,4 +14,4 @@ <h1>Tools & Extra links</h1>
 <h1>Content & Settings</h1>
 {{block.super}}
 
-{% endblock %}
\ No newline at end of file
+{% endblock %}