ROSSEN, H.M., SRIVASTAVA, H.M. and AOUF, M.K. 1998. CERTAIN CLASSES OF ANALYTIC AND MULTIVALENT FUNCTIONS. Tamkang Journal of Mathematics. 29, 3 (Sep. 1998), 233–244. DOI:https://doi.org/10.5556/j.tkjm.29.1998.4275.