Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP231_r124583](http://classic.wikipathways.org/instance/WP231_r124583) 'TNF-alpha signaling pathway' in Homo sapiens has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference