A fourth order composite two-step method for stiff problems. - Solomon A. Okunuga (Int. J. Comput. Math., 1999)

3-Point Block Methods for Direct Integration of General Second-Order Ordinary Differential Equations. - Julius Osato Ehigie; Solomon A. Okunuga; Adetokunbo B. Sofoluwe (Adv. Numer. Anal., 2011)

Step Size Bounds for a Class of Multiderivative Explicit Runge-Kutta Methods. - Moses Adebowale Akanbi; Solomon A. Okunuga; Adetokunbo B. Sofoluwe (MS, 2012)

High-order continuous third derivative formulas with block extensions for y″=f(x, y, y′). - Samuel N. Jator; O. A. Akinfenwa; Solomon A. Okunuga; Adetokunbo B. Sofoluwe (Int. J. Comput. Math., 2013)

A second-derivative functionally fitted method of maximal order for oscillatory initial value problems. - Ridwanulahi I. Abdulganiy; Olusheye A. Akinfenwa; Higinio Ramos; Solomon A. Okunuga (Comput. Appl. Math., 2021)

Exponentially fitted two-derivative DIRK methods for oscillatory differential equations. - Julius Osato Ehigie; Vu Thai Luan; Solomon A. Okunuga; Xiong You (Appl. Math. Comput., 2022)

A functionally-fitted block hybrid Falkner method for Kepler equations and related problems. - Ridwanulahi I. Abdulganiy; Higinio Ramos; J. A. Osilagun; Solomon A. Okunuga; Sania Qureshi (Comput. Appl. Math., 2023)