Shanmuguam, T.N., M.P. Jeyaraman, and A. Singaravelu. 2012. “DIFFERENTIAL SANDWICH THEOREMS FOR SOME SUBCLASS OF ANALYTIC FUNCTIONS ASSOCIATED WITH LINEAR OPERATORS”. Journal of the Indonesian Mathematical Society 13 (1):39-50. https://doi.org/10.22342/jims.13.1.73.39-50.