Nyffeler, R. & Eggli, U. (2010), "A farewell to dated ideas and concepts: molecular phylogenetics and a revised suprageneric classification of the family Cactaceae", Schumannia, 6: 109–149, doi:10.5167/uzh-43285
Liddell, Henry George & Scott, Robert (1940), "νησιωτικός", A Greek-English Lexicon (online version), Trustees of Tufts University, Oxford, retrieved 2017-03-24