Vazquez-Leal, H., et al. “Application of HPM to Solve Unsteady Squeezing Flow of a Second-Grade Fluid Between Circular Plates”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 27, no. 1, Jan. 2017, pp. 161-78, https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/1421.