by Prasad, Ankit.
by Islam, Md. Nazrul.
by Giri,P.K.
by Dasgupta, Samira and Amitabha Sarkar.
by Wilkinson Steven I.
by Bhattacharyya N.N.
by Gartner John D.
by N.N Bhattacharya.
by Aston,T.H and Philpin ,C.H.E.
by Debroy, Bibek.