Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP406_r116926](http://classic.wikipathways.org/instance/WP406_r116926) 'Mitochondrial long chain fatty acid beta-oxidation' in Drosophila melanogaster has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference