Rousseau, C., and Zhu, H., 2004: PP-graphics with a nilpotent elliptic singularity in quadratic systems and Hilbert’s 16th problem. J. Differential Equations, Vol. 196 (1), p. 169–208
Feng, Z., Yi, Y., and Zhu, H., 2004: Fast and slow dynamics of malaria and the S-gene frequency. J. Dynam. Differential Equations, Vol. 16, p. 869–896
Webb, G.F., Blaser, M.J., Zhu, H., Ardal, S., and Wu, J., 2004: Critical Role of Nosocomial Transmission in the Toronto SARS Outbreak. Math. Biosci. Eng., Vol. 1 (1), p. 1-13
Feng, Z., Swihart, R., Yi, Y., Zhu, H., 2004: Coexistence in a metapopulation model with explicit local dynamics. Math. Biosci., Vol. 1 (1), p. 131-45
Zhu H., 1986: A note on Mean Value Theorem in calculus, J. Huaiyin Normal University, Natur. Ed. Vol. 3. (This is the first paper encouraged by Prof. Jiaxiu Ji, Huaiyin Normal University. He was my high school teacher, also known as “Ji Triangle” in Jiangsu Province, China).
Zhu. H., 1991: A Initial-boundary Value Problem for the First Order Singular Perturbed Differential Systems in “Ordinary Differential Equations''. Proceeding of the first Chinese National Conference for Youth on Ordinary Differential Equations. Ed. Y. Qin, Scientific Publishing House. p. 241-247
Zhu, H., 1992: A singularly perturbed boundary value problem in the critical case, J. Nanjing Norm. Univ. Natur. Ed. Vol. 4, p. 3–11
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., and Lin, W., 1994: The singularly perturbed Dirichlet problem for a system of conditionally stable quasilinear second-order equations. J. East China Norm. Univ. Natur. Sci. Ed. Vol. 4, p. 15–24
Zhu, H., 1994: A singular singularly perturbed boundary value problem of the second order quasilinear systems, J. Math. Anal. Appl. Vol. 182 (2), p. 320–347