Wetting Fronts in One-Dimensional Periodically Layered Soils. - George Fennemore; Jack X. Xin (SIAM J. Appl. Math., 1998)

Stability, Relaxation, and Oscillation of Biodegradation Fronts. - Jack X. Xin; James Mac Hyman (SIAM J. Appl. Math., 2000)