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Dietrich, G. 2000. In C. Dobea & E. Vitek, Documented Chromosome Number Checklist of Austrian Vascular Plants. Verlag des Naturhistorischen Museums Wien, Vienna.
-- 1974. Recherches sur les liens de parent? entre la flore orophile de Alpes et celle des Pyr?n?es. Boissiera 23, 1-322.° under Crocus cf. napolitanus Mord. & Loisel.
Brighton, C. A. 1976. Cytological problems in the genus Crocus (Iridaceae): I. Crocus vernus aggregate. Kew Bull. 31[1], 33-46. under Crocus heuffelianus Herb.