Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP680_r118353](http://classic.wikipathways.org/instance/WP680_r118353) 'Vulval development and SynMuv' in Caenorhabditis elegans has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference