HAYAT, T.; KHAN, M.; AYUB, M.; SIDDIQUI, A.M. The unsteady Couette flow of a second grade fluid in a layer of porous medium. Archives of Mechanics, Warsaw, Poland, v. 57, n. 5, p. 405–416, 2005. Disponível em: https://am.ippt.pan.pl/index.php/am/article/view/v57p405. Acesso em: 7 jan. 2026.