Gómez-Hinostrosa C., Hernández H. M., Studies on Mexican Cactaceae. VII. Taxonomic Notes on Disocactus heterodoxus, Brittonia, 2023, 75(1):79-88, doi: 10.1007/s12228-022-09732-w
Morphology, distribution and species identity of Disocactus heterodoxus.