diff --git a/collections/NTLR_JAXA_Nighttimelevel_Rural.yaml b/collections/NTLR_JAXA_Nighttimelevel_Rural.yaml
index eec4d695..2efb3c7f 100644
--- a/collections/NTLR_JAXA_Nighttimelevel_Rural.yaml
+++ b/collections/NTLR_JAXA_Nighttimelevel_Rural.yaml
@@ -19,6 +19,11 @@ DataSource:
     - Other
 Agency:
   - JAXA
+Citation:
+  Publication:
+  - Citation: | 
+      Bunpei Tojo, "Application of earth observation satellite data to public health Comparison of night light (VIIRS) and solar radiation (SGLI) and domestic COVID-19 epidemic", Transdisciplinary 12th Federation of Science and Technology conference 2021
+    DOI: 10.11487/oukan.2021.0_B-4-4
 References:
   - Name: Level-1 data access
     Url: https://ladsweb.modaps.eosdis.nasa.gov/