Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP137_r117288](http://classic.wikipathways.org/instance/WP137_r117288) 'Fatty acid biosynthesis, initial steps' in Saccharomyces cerevisiae has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference