Pathania, P. C., et al. “Studies on Butterfly Diversity (Lepidoptera: Papilionoidea) from Punjab Agricultural University Campus, Ludhiana, Punjab, India”. Records of the Zoological Survey of India, vol. 118, no. 1, May 2018, pp. 75-90, doi:10.26515/rzsi/v118/i1/2018/121626.