Ali, M. A., N. Jahan, and A. K. M. A. Islam. “Sulvanite Compounds Cu₃TMS<sub>4</Sub> (TM = V, Nb and Ta): Elastic, Electronic, Optical and Thermal Properties Using First-Principles Method”. Journal of Scientific Research, vol. 6, no. 3, Aug. 2014, pp. 407-19, doi:10.3329/jsr.v6i3.19191.