Felix , I.C., Famoofo , O.O. and Akintewe , S.M. 2019. A New Symmetric p-stable Obrechkoff Method with Optimal Phase lag for Oscillatory Problems . Earthline Journal of Mathematical Sciences. 1, 1 (Jan. 2019), 105-118. DOI:https://doi.org/10.34198/ejms.1119.105118.