Zhu, H., 1994: The multi-layers solution for a singular singularly perturbed initial boundary value problem. J. Nanjing Norm. Univ. Natur. Ed. Vol.1, p. 1–10
Zhu, H., 1994: The multi-layers solution for a singular singularly perturbed initial boundary value problem. J. Nanjing Norm. Univ. Natur. Ed. Vol.1, p. 1–10