A. M. Siddiqui, S. Irum, and A. R. Ansari, “Unsteady squeezing flow of a viscous MHD fluid between parallel plates, a solution using the homotopy perturbation method”, MMA, vol. 13, no. 4, pp. 565–576, Dec. 2008, doi: 10.3846/1392-6292.2008.13.565-576.