On the iterative process of solving nonlinear operator equations in PTL-spaces R. Sen — 1978 Matematički Vesnik
Cyclic structures of geometric objects involving a connection and Lie derivatives R. N. Sen — 1972 Colloquium Mathematicae
Ascoli's theorem in almost quiet quasi-uniform space. Ganguly, S.; Sen, R. — 2007 Acta Mathematica Universitatis Comenianae. New Series