Non-local symmetries and conservation laws for one-dimensional gas dynamics equations. - A. Sjöberg; Fazal Mahmood Mahomed (Appl. Math. Comput., 2004)

The association of non-local symmetries with conservation laws: applications to the heat and Burger's equations. - A. Sjöberg; Fazal Mahmood Mahomed (Appl. Math. Comput., 2005)

Double reduction of PDEs from the association of symmetries with conservation laws with applications. - A. Sjöberg (Appl. Math. Comput., 2007)