1. Dhawan BN, Patnaik GK. In: Randhawa NS, Parmar BS, editors. Neem research and development. India: Society of Pesticide Science, 1993:242–249.
2. Dev Kumar C, Sukh Dev. In: Randhawa NS, Parmar BS, editors. Neem research and development. New Delhi, India: Society of Pesticide Science, 1993:63–96.
3. Design of new melanin biosynthesis inhibitors
4. The Merck Index. Budavari S, editor. 2th ed. Whitehouse Station, New Jersey: Merck and Co Inc, 1996:975.