Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP39_r124942](http://classic.wikipathways.org/instance/WP39_r124942) 'Fatty acid beta-oxidation 1' in Drosophila melanogaster has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference