Dense sets, nowhere dense sets and an ideal in generalized closure spaces. Chattopadhyay, Chandan — 2007 Matematichki Vesnik
On strongly pre-open sets and a decomposition of continuity. Chattopadhyay, Chandan — 2005 Matematichki Vesnik
On resolvable and irresolvable spaces. Chattopadhyay, Chandan; Bandyopadhyay, Chhanda — 1993 International Journal of Mathematics and Mathematical Sciences
d e l t a -sets, irresolvable and resolvable spaces Chandan Chattopadhyay; Uttam Kumar Roy — 1992 Mathematica Slovaca