1. Afanas’eva, N.N., Morphological and anatomic features and systematic of Haemanthus (Amaryllidaceae), Bot. Zh., 1995, vol. 80, no. 3, pp. 30–40.
2. APG II, An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants, Bot. J. Linn. Soc., 2003, vol. 141, pp. 399–436.
3. APG IV, An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants, Bot. J. Linn. Soc., 2016, vol. 181, no. 1, pp. 1–20.
4. Artyushenko, Z.T., Amarillisovye (Amaryllidaceae Jaume St.-Hilaire) SSSR. Morfologiya, sistematika i ispol’zovanie. Monografiya (Amaryllis (Amaryllidaceae Jaume St.-Hilaire) of USSR: Morphology, Systematics, and Use. Monograph), Leningrad: Nauka, 1970.
5. Artyushenko, Z.T. and Shchepak, A.V., Shoot branching of the members of family Amaryllidaceae, Bot. Zh., 1982, vol. 67, no. 8, pp. 1074–1082.