A Class of Simple Exponential B-Splines and Their Application to Numerical Solution to Singular Perturbation Problems. Manabu Sakai; Riaz A. Usmani — 1987 Numerische Mathematik
Spline solutions for nonlinear two point boundary value problems. Usmani, Riaz A. — 1980 International Journal of Mathematics and Mathematical Sciences
Finite difference methods for computing eigenvalues of fourth order boundary value problems. Usmani, Riaz A. — 1986 International Journal of Mathematics and Mathematical Sciences
Two new finite difference methods for computing eigenvalues of a fourth order linear boundary value problem. Usmani, Riaz A.; Sakai, Manabu — 1987 International Journal of Mathematics and Mathematical Sciences
Numerical methods for approximating eigenvalues of boundary value problems. Usmani, Riaz A.; Isa, Mohammad — 1986 International Journal of Mathematics and Mathematical Sciences