Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP25_r127986](http://classic.wikipathways.org/instance/WP25_r127986) 'Fatty acid beta-oxidation 3' in Drosophila melanogaster has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference