Template:Das et al., 2019
- Das, G.N., Gayen, S., Sanyal, A.K., Kumar, V., Bálint, Z. 2019. The lesser-known Kumaon Meadow Blue Polyommatus dux Riley, 1926 (Lepidoptera: Lycaenidae: Polyommatinae: Polyommatini) from Uttarakhand, Western Himalaya. Caucasian Entomological Bulletin 15(2): 375–380.