Reducibility of zero curvature equations. Flores-Espinoza, Ruben — 2004 Electronic Journal of Differential Equations (EJDE) [electronic only]
Asymptotic behavior for the centered-rarefaction appearance problem. Flores-Espinoza, Ruben; Omel'yanov, Georgii A. — 2005 Electronic Journal of Differential Equations (EJDE) [electronic only]