In the "Acta" of 1691 James Bernoulli derived the equation for the tractrix.
在1691年的《学报》中詹姆士?伯努利推导出跟踪曲线的方程。
LIU Jia-Wen,DING Min.Morphological and cytogenetical studies on intergeneric hybrid between triticum aestivum and erem opyrum orientale.Acta Genetica Sinica,1996,23(2):117-123.