Ren,Zhihua;Wang,Peirong;Xu,Yanqin;Wu, Hao; Formal and analytic normal forms for non-autonomous difference systems with uniform dichotomy spectrum.Adv. Difference Equ.2020,Paper No. 118, 18 pp.

Guo, Lingling;Ren, ZhihuaPolynomial normal forms for some germs of nonstrongly 1-resonant diffeomorphisms.Internat. J. Bifur. Chaos Appl. Sci. Engrg.25(2015),no. 13,1550174, 8 pp.

Ren, Zhihua;Xia, Li;Yang, JiazhongOn classification of the Poincaré type maps onR³.Bull. Sci. Math.139(2015),no. 5,582–598.

Ren, Zhihua;Yan, Shuo;Yang, JiazhongFinite determinacy and polynomial normal forms for diffeomorphisms near a strongly 1-resonant fixed point.J. Math. Anal. Appl.413(2014),no. 1,476–481.

Ren, Zhihua;Peng, ZhaoxiaSmooth moduli-free normal forms of hyperbolic germs of diffeomorphisms.Dyn. Syst.28(2013),no. 2,251–262.

Ren, Zhihua;Yang, Jiazhong;Yu, FuwangOn conjugating equivalence of 0-resonant diffeomorphisms onR³.Internat. J. Bifur. Chaos Appl. Sci. Engrg.23(2013),no. 6,1350100, 6 pp.

Ren, Zhihua;Peng, ZhaoxiaOn smooth conjugacy of hyperbolic diffeomorphism germs.Bull. Sci. Math.137(2013),no. 5,584–588.

Ren, ZhihuaSmooth classification and linearization of hyperbolic vector fields onR 3.Ann. Differential Equations25(2009),no. 3,343–347.

Li, Chengzhi;Ren, Zhihua;Yang, JiazhongModuli-free normal forms and linearization of vector fields.Internat. J. Bifur. Chaos Appl. Sci. Engrg.16(2006),no. 12,3759–3764.

Ren, Zhi HuaSmooth linearizability of some hyperbolic vector fields.(Chinese)Beijing Daxue Xuebao Ziran Kexue Ban40(2004),no. 1,1–4.

Ren, Zhihua;Yang, JiazhongOnC¹classifications of hyperbolic vector fields.J. Math. Anal. Appl.284(2003),no. 1,118–126.

Ren, Zhihua;Yang, JiazhongOn theC¹normal forms of hyperbolic vector fields.C. R. Math. Acad. Sci. Paris336(2003),no. 9,709–712.