Las Peñas M. L., Urdampilleta J. D., López-Carro B., Santiñaque F., Kiesling R., Bernardello G., Classical and molecular cytogenetics and DNA content in Maihuenia and Pereskia (Cactaceae), Plant Systematics and Evolution, 2014, 300(3):549-558, doi: 10.1007/s00606-013-0903-x
A study of karyotypes, heterochromatin, the location of ribosomal genes and DNA content. It compares both Maihuenia species and selected Pereskia species, including diploid and tetraploid cytotypes of M. patagonica.