Convolution Conditions for Convexity, Starlikeness and Spiral-Likeness. H. Silvermann; E.M. Silvia; D. Telage — 1978 Mathematische Zeitschrift
Subclasses of close-to-convex functions. Silvia, E.M. — 1983 International Journal of Mathematics and Mathematical Sciences
Prestarlike functions with negative coefficients. Silverman, H.; Silvia, E.M. — 1979 International Journal of Mathematics and Mathematical Sciences