Template:Doweld, 2000m
- Doweld, A.B. 2000. Конспект филогенетической системы трибы Cacteae (Cactoideae–Cactaceae) IV. Система подтриб Cochemieinae, Pelecyphorinae, Escobariinae и Cactinae [An outline of the phylogenetic system of classification of the tribe Cacteae (Cactoideae–Cactaceae) IV. System of classification of the subtribes Cochemieinae, Pelecyphorinae, Escobariinae and Cactinae]. Sukkulenty 3(1–2): 12–35. (Russian)