Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP134_r126271](http://classic.wikipathways.org/instance/WP134_r126271) 'Pentose phosphate metabolism' in Homo sapiens has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference