Phase Fitted And Amplification Fitted Of Runge-Kutta-Fehlberg Method Of Order 4(5) For Solving Oscillatory Problems. Baghdad Sci.J [Internet]. 2020 Jun. 22 [cited 2024 May 3];17(2(SI):0689. Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/4024