Singh, B., J. Mishra, K. Pitre, A. Pradhan, and P. Soni. “Anticancer Activity of New Copper (II) Complexes With 6-Thiguanine Drug”. International Journal of Biotechnology for Wellness Industries, vol. 2, no. 1, Mar. 2013, pp. 39-44, doi:10.6000/1927-3037.2013.02.01.6.