M. A. Howlader, M. A. I. Arif, L. Andallah, and M. O. Gani, “Existence of Periodic Traveling Waves in the Klausmeier Model of Desertification and its Modification: A Comparative Study”, GANIT: J. Bangladesh Math. Soc., vol. 38, pp. 27–46, Dec. 2018.