Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP4335_r117875](http://classic.wikipathways.org/instance/WP4335_r117875) 'Eicosanoid lipid synthesis map' in Mus musculus has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference