Kumar, Charn, et al. “Breeding Behaviour of Purple Sunbird, <i>Cinnyris asiaticus< I> (Latham, 1790) in Semiurban Area of Punjab”. Records of the Zoological Survey of India, vol. 120, no. 4, Feb. 2021, pp. 323-40, doi:10.26515/rzsi/v120/i4/2020/152044.