Siraj-ul-IslamMuhammad Aslam NoorSyed Ikram A. TirmiziMuhammad Azam KhanQuadratic non-polynomial spline approach to the solution of a system of second-order boundary-value problems.153-1602006179Appl. Math. Comput.1https://doi.org/10.1016/j.amc.2005.11.091db/journals/amc/amc179.html#Siraj-Ul-IslamNTK06