diff --git a/backend/src/import-from-ss.js b/backend/src/import-from-ss.js
index db0f2fc..86ac5a4 100644
--- a/backend/src/import-from-ss.js
+++ b/backend/src/import-from-ss.js
@@ -152,9 +152,10 @@ module.exports = async (req, res) => {
 
   console.log('references count:', paper.references.length);
 
-  const eachCitationWeightPercent = Math.floor(PPM_TO_CITATIONS / paper.references.length);
+  const references = paper.references.filter((x) => !!x.paperId);
+  const eachCitationWeightPercent = Math.floor(PPM_TO_CITATIONS / references.length);
   const citations = await Promise.mapSeries(
-    paper.references.filter((x) => !!x.paperId),
+    references,
     async (citedPaper) => {
       // We need to fetch this paper so we can generate the post we WOULD add to the forum.
       // That way, if we later add the cited paper to the blockchain it will have the correct hash.