Liu, Zhongkui; Qiao, Husheng Extensions of left APP-rings. (English) Zbl 1185.16002 Arab. J. Sci. Eng., Sect. A, Sci. 33, No. 2, 305-312 (2008). MSC: 16D40 16P60 PDFBibTeX XMLCite \textit{Z. Liu} and \textit{H. Qiao}, Arab. J. Sci. Eng., Sect. A, Sci. 33, No. 2, 305--312 (2008; Zbl 1185.16002)
Qiao, Husheng; Wang, Limin; Liu, Zhongkui On some new characterizations of right cancellative monoids by flatness properties. (English) Zbl 1185.20059 Arab. J. Sci. Eng., Sect. A, Sci. 32, No. 1, 75-82 (2007). MSC: 20M50 PDFBibTeX XMLCite \textit{H. Qiao} et al., Arab. J. Sci. Eng., Sect. A, Sci. 32, No. 1, 75--82 (2007; Zbl 1185.20059)