K.Anil Babu, V.NarasimhaRao, P.Dinesh Kumar, Anil Babu G, and T.Krishna Sindhuri, “Formulation and evaluation of combination porous tablet containing naproxen sodium as immediate release and sumatriptan succinate as sustained release”, IJPAR , vol. 3, no. 4, pp. 500–510, Dec. 2014.