Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP133_r116963](http://classic.wikipathways.org/instance/WP133_r116963) 'Fatty acid omega-oxidation' in Rattus norvegicus has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference