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[11] Z. Jiang and W. Ma, Permanence of a delayed SIR epidemic model with general nonlinear incidence rate, Math. Methods Appl. Sci., (38)2015, 505–516..
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[12] B. G. Sampath Aruna Pradeep and W. Ma, Stability properties of a delayed HIV dynamics model with Beddington - Deangelis functional response and absorption effect, Dyn. Contin. Discrete Impul. Syst., Series A: Math. Anal., 21 (2014), 421-434..
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[13] Z. Jiang, W. Ma and D. Li, Dynamical behavior of a delay differential equation system on toxin producing phytoplankton and zooplankton interaction, Japan J. Indust. Appl. Math., 31( 2014), 583-609..
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[14] C. Fu and W. Ma, Partial stability of some guidance dynamic systems with delayed line-of-sight angular rate, Int. J. Control, Auto., Syst., 12(2014), 1234-1244..
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[15] Q. Dong and W. Ma, Qualitative analysis of a chemostat model with inhibitory exponential substrate uptake and a time delay, Int. J. Biomath., 7(2014), 1450045 (16 pages)..
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[16] S. Guo, W. Ma and B. G. Sampath Aruna Pradeep, Necessary and sufficient conditions for oscillation of neutral delay differential equations, Elect. J. Differ. Equations, 2014 (2014), No. 138, 1-12..
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[17] Z. Hu, W. Pang, F. Liao and W. Ma, Analysis of a CD4+ T cell viral infection model with a class of saturated infection rate, Discrete Contin. Dyn. Syst.-B, 19(2014), 735-745..
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[18] S. Guo and W. Ma, Complete characterizations of the gamma function, Appl. Math. Comput., 244 (2014), 912–916..
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[19] Z. Hu, J. Zhang, H. Wang, W. Ma and F. Liao, Dynamics analysis of a delayed viral infection model with logistic growth and immune impairment, Appl. Math. Modelling, 38 (2014), 524–534..
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[20] D. Li, W. Ma and Z. Jiang, An epidemic model for Tick-Borne disease with two delays, J. Appl. Math., Volume 2013, Article ID 419593, 12 pages..
