The Serre duality theorem for Riemann surfaces. Ranjan, Roy — 1984 International Journal of Mathematics and Mathematical Sciences
Ramanujan's method in q -series congruences. Andrews, George E.; Roy, Ranjan — 1997 The Electronic Journal of Combinatorics [electronic only]
Bounded index, entire solutions of ordinary differential equations and summability methods. Fricke, G.H.; Roy, Ranjan; Shah, S.M. — 1981 International Journal of Mathematics and Mathematical Sciences