Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP281_r116929](http://classic.wikipathways.org/instance/WP281_r116929) 'Proteasome degradation' in Drosophila melanogaster has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference