Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP418_r118918](http://classic.wikipathways.org/instance/WP418_r118918) 'Beta-oxidation of unsaturated fatty acids' in Rattus norvegicus has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference