diff --git a/backend/core/models.py b/backend/core/models.py
index 7407d4853..3b0860c8a 100644
--- a/backend/core/models.py
+++ b/backend/core/models.py
@@ -1501,7 +1501,7 @@ def get_descendants(self) -> set[Self]:
         children = self.get_children()
         sub_children = set()
         for child in children:
-            sub_children.append(child)
+            sub_children.add(child)
             sub_children.update(child.get_descendants())
         return sub_children
 
diff --git a/backend/core/serializers.py b/backend/core/serializers.py
index 6595dd66a..75547b1ff 100644
--- a/backend/core/serializers.py
+++ b/backend/core/serializers.py
@@ -210,10 +210,11 @@ class RiskAssessmentReadSerializer(AssessmentReadSerializer):
     risk_scenarios = FieldsRelatedField(many=True)
     risk_scenarios_count = serializers.IntegerField(source="risk_scenarios.count")
     risk_matrix = FieldsRelatedField()
+    ebios_rm_study = FieldsRelatedField(["id", "name"])
 
     class Meta:
         model = RiskAssessment
-        exclude = ["ebios_rm_study"]
+        exclude = []
 
 
 class AssetWriteSerializer(BaseModelSerializer):
diff --git a/backend/ebios_rm/migrations/0009_alter_roto_activity.py b/backend/ebios_rm/migrations/0009_alter_roto_activity.py
index 3705c2d84..86b3f5d53 100644
--- a/backend/ebios_rm/migrations/0009_alter_roto_activity.py
+++ b/backend/ebios_rm/migrations/0009_alter_roto_activity.py
@@ -5,15 +5,25 @@
 
 
 class Migration(migrations.Migration):
-
     dependencies = [
-        ('ebios_rm', '0008_remove_attackpath_ro_to_couple_strategicscenario_and_more'),
+        ("ebios_rm", "0008_remove_attackpath_ro_to_couple_strategicscenario_and_more"),
     ]
 
     operations = [
         migrations.AlterField(
-            model_name='roto',
-            name='activity',
-            field=models.PositiveSmallIntegerField(choices=[(0, 'undefined'), (1, 'very_low'), (2, 'low'), (3, 'moderate'), (4, 'important')], default=0, validators=[django.core.validators.MaxValueValidator(4)], verbose_name='Activity'),
+            model_name="roto",
+            name="activity",
+            field=models.PositiveSmallIntegerField(
+                choices=[
+                    (0, "undefined"),
+                    (1, "very_low"),
+                    (2, "low"),
+                    (3, "moderate"),
+                    (4, "important"),
+                ],
+                default=0,
+                validators=[django.core.validators.MaxValueValidator(4)],
+                verbose_name="Activity",
+            ),
         ),
     ]
diff --git a/backend/ebios_rm/models.py b/backend/ebios_rm/models.py
index 584b70dff..5b35766fc 100644
--- a/backend/ebios_rm/models.py
+++ b/backend/ebios_rm/models.py
@@ -655,7 +655,7 @@ def ro_to(self):
 
     def get_assets(self):
         initial_assets = Asset.objects.filter(
-            feared_events__in=self.ro_to.feared_events.all(), is_selected=True
+            feared_events__in=self.ro_to.feared_events.filter(is_selected=True)
         )
         assets = set()
         for asset in initial_assets:
diff --git a/backend/ebios_rm/views.py b/backend/ebios_rm/views.py
index 59535e697..92f8c7ca2 100644
--- a/backend/ebios_rm/views.py
+++ b/backend/ebios_rm/views.py
@@ -139,7 +139,7 @@ def motivation(self, request):
     @action(detail=False, name="Get resources choices")
     def resources(self, request):
         return Response(dict(RoTo.Resources.choices))
-    
+
     @action(detail=False, name="Get activity choices")
     def activity(self, request):
         return Response(dict(RoTo.Activity.choices))
diff --git a/frontend/src/routes/(app)/(internal)/risk-assessments/[id=uuid]/+page.svelte b/frontend/src/routes/(app)/(internal)/risk-assessments/[id=uuid]/+page.svelte
index 8286307d0..8910121e3 100644
--- a/frontend/src/routes/(app)/(internal)/risk-assessments/[id=uuid]/+page.svelte
+++ b/frontend/src/routes/(app)/(internal)/risk-assessments/[id=uuid]/+page.svelte
@@ -199,6 +199,17 @@
 					>
 				</div>
 				<br />
+				<div class="text-sm">
+					<span class="font-semibold" data-testid="risk-matrix-field-title"
+						>{m.ebiosRmStudy()}:</span
+					>
+					<a
+						href="/ebios-rm/{risk_assessment.ebios_rm_study.id}"
+						class="anchor"
+						data-testid="ebios-rm-field-value">{risk_assessment.ebios_rm_study.name}</a
+					>
+				</div>
+				<br />
 				<div class="text-sm">
 					<span class="font-semibold" data-testid="description-field-title">{m.description()}:</span
 					>