Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP1396_r117923](http://classic.wikipathways.org/instance/WP1396_r117923) 'GPCRs, non-odorant ' in Mus musculus has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference