A unified Krylov-Bogoliubov-Mitropolskii method for solving nth order nonlinear systems. - M. Shamsul Alam (J. Frankl. Inst., 2002)

Unified Krylov-Bogoliubov-Mitropolskii method under a critical condition. - M. Shamsul Alam (J. Frankl. Inst., 2004)

An extension of the general Struble's method for solving an nth order nonlinear differential equation when the corresponding unperturbed equation has some repeated eigenvalues. - M. Shamsul Alam; Md. Abul Kalam Azad 005; Kamalesh Chandra Roy; M. Majedur Rahman (J. Frankl. Inst., 2009)

An analytical technique to find approximate solutions of nonlinear damped oscillatory systems. - M. Shamsul Alam; Kamalesh Chandra Roy; M. Saifur Rahman; Md. Mossaraf Hossain (J. Frankl. Inst., 2011)

An analytical technique for solving a class of strongly nonlinear conservative systems. - Md. Alal Hosen; M. Saifur Rahman; M. Shamsul Alam; M. Ruhul Amin (Appl. Math. Comput., 2012)