1. Aswal, B. S. and Mehrotra, B. N. 1994. Flora of Lahaul-Spiti (A Cold Desert in the North-West Himalaya). Bishen Singh Mahender Pal Singh, India. pp. 466-522.
2. Bala, S. and Gupta, R. C. 2011. In IAPT/IOPB chromosome data-12. Taxon 60: 1784-1796.
3. Carlbom, C. 1968. Evolutionary relationships in the genus Scrophularia L. Hereditas 61: 287-301.
4. Darlington, C. D. and Wylie, A. P. 1955. Chromosome Atlas of Flowering Plants. George Allen and Unwin Ltd., London. Dhillon, S. S. 1979. Cytological studies in Scrophularia: Presence of B-chromosomes. Cytologia 44: 211-214.
5. Fischer, E. 2004. Scrophulariaceae. Kubitzki K. (ed.), The family and genera of vascular plants. Springer-Verlag. Berlin Heidelberg 7: 333-432.