Zhang, Bin; Du, Xiuhua; Zheng, Zhaowen The limit circle criteria for a class of dynamic equations on time scales with application. (Chinese. English summary) Zbl 1212.34115 J. Qufu Norm. Univ., Nat. Sci. 35, No. 2, 6-10 (2009). MSC: 34C11 34D05 PDFBibTeX XMLCite \textit{B. Zhang} et al., J. Qufu Norm. Univ., Nat. Sci. 35, No. 2, 6--10 (2009; Zbl 1212.34115)
Wang, Chunwei; Gao, Xingping On the discounted penalty function in a Cox risk model. (English) Zbl 1212.91046 J. Qufu Norm. Univ., Nat. Sci. 35, No. 2, 31-35 (2009). MSC: 91B30 62P05 PDFBibTeX XMLCite \textit{C. Wang} and \textit{X. Gao}, J. Qufu Norm. Univ., Nat. Sci. 35, No. 2, 31--35 (2009; Zbl 1212.91046)
Zhang, Hongyu; Wang, Yingni; Wang, Yiju A projection and contraction method for a system of nonlinear equations with convex constraints. (Chinese. English summary) Zbl 1212.90371 J. Qufu Norm. Univ., Nat. Sci. 35, No. 2, 11-16 (2009). MSC: 90C30 PDFBibTeX XMLCite \textit{H. Zhang} et al., J. Qufu Norm. Univ., Nat. Sci. 35, No. 2, 11--16 (2009; Zbl 1212.90371)
Bi, Ying; Zheng, Zhaowen; Hou, Wei On self-adjointness of the product of two Hamiltonian operators. (Chinese. English summary) Zbl 1211.47024 J. Qufu Norm. Univ., Nat. Sci. 35, No. 2, 1-5 (2009). MSC: 47B25 47E05 PDFBibTeX XMLCite \textit{Y. Bi} et al., J. Qufu Norm. Univ., Nat. Sci. 35, No. 2, 1--5 (2009; Zbl 1211.47024)