Zhang, Sheng; Dong, Jie Xu Youren and an expression of the coefficients of the difference in his Ce Yuan Mi Lü. (Chinese. English summary) Zbl 1340.01006 J. Inn. Mong. Norm. Univ., Nat. Sci. 44, No. 1, 108-112 (2015). MSC: 01A25 PDFBibTeX XMLCite \textit{S. Zhang} and \textit{J. Dong}, J. Inn. Mong. Norm. Univ., Nat. Sci. 44, No. 1, 108--112 (2015; Zbl 1340.01006)
Luo, Jianjin Tangent numbers: its meaning and research history in China and West. (Chinese. English summary) Zbl 1199.01006 J. Inn. Mong. Norm. Univ., Nat. Sci. 37, No. 1, 120-123, 131 (2008). MSC: 01A25 01A05 PDFBibTeX XMLCite \textit{J. Luo}, J. Inn. Mong. Norm. Univ., Nat. Sci. 37, No. 1, 120--123, 131 (2008; Zbl 1199.01006)
Luo, Jianjin Tangent number: a study by Xu Youren in his book Ce Yuan Mi Lu. (Chinese. English summary) Zbl 1128.01004 J. Northwest Univ., Nat. Sci. Ed. 36, No. 5, 853-857 (2006). Reviewer: J.-C. Martzloff (Paris) MSC: 01A25 01A55 11B68 PDFBibTeX XMLCite \textit{J. Luo}, J. Northwest Univ., Nat. Sci. Ed. 36, No. 5, 853--857 (2006; Zbl 1128.01004)