Representability of V[h] as intersection of Λ-bounded variation classes Pedro Isaza — 1988 Fundamenta Mathematicae
Global solution for the Kadomtsev-Petviashvili equation (KPII) in anisotropic Sobolev spaces of negative indices. Isaza J., Pedro; Mejía L., Jorge — 2003 Electronic Journal of Differential Equations (EJDE) [electronic only]