Impacts of activation energy and modified Darcy law on the motion of Williamson nanofluid over a stretching riga sheet through Porous medium. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 1, p. 5616, 2025. DOI: 10.29020/nybg.ejpam.v18i1.5616. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/5616. Acesso em: 22 feb. 2025.