JURGAITIS, Donatas. Analytical reduction of a system of partial differential equations . Lietuvos matematikos rinkinys, [S. l.], v. 38, n. II, p. 117–121 , 1998. DOI: 10.15388/LMD.1998.37768. Disponível em: https://www.journals.vu.lt/LMR/article/view/37768. Acesso em: 11 apr. 2025.