On the strict hyperbolicity of the Buckley-Leverett equations for three-phase flow Publication details Journal: SIAM Journal on Applied Mathematics, vol. 50, p. 667–682, Monday 1. January 1990 International Standard Numbers: Printed: 0036-1399 Electronic: 1095-712X You are here: Home Publications Scientific article On the strict hyperbolicity of the Buckley-Leverett equations for three-phase flow