Elshehawey, E.F., et al. “Hydromagnetic Flow Over a Stretching Sheet of a Viscoelastic Fluid With Uniform Suction at the Wall and Heat Transfer”. Engineering Transactions, vol. 33, no. 3, Sept. 1985, pp. 299-10, https://et3.ippt.pan.pl/index.php/et/article/view/1850.