Begum, N., K. Manipriya, R. Begum, and V. B. “Simple and Rapid Method for Rat Estrous Cycle Identification Using Crystal Violet- Hormonal Consideration”. INTERNATIONAL JOURNAL OF APPLIED PHARMACEUTICAL SCIENCES AND RESEARCH, Vol. 5, no. 04, June 2020, pp. 54-59, doi:10.21477/ijapsr.5.4.1.