Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP287_r117360](http://classic.wikipathways.org/instance/WP287_r117360) 'Upiquinone Q prenylation' in Saccharomyces cerevisiae has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference