Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP24_r127982](http://classic.wikipathways.org/instance/WP24_r127982) 'Peptide GPCRs' in Homo sapiens has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference