Xu, Kang Discovery and investigation of some historical documents concerning the “Changsha School of mathematics” towards the end of the Qing dynasty. (Chinese) Zbl 0677.01002 Hunan Ann. Math. 6, No. 1, 99-104 (1986). MSC: 01A25 History of Chinese mathematics PDFBibTeX XMLCite \textit{K. Xu}, Hunan Ann. Math. 6, No. 1, 99--104 (1986; Zbl 0677.01002)