1Fauvel, J. Revisiting the history of log- arithm[M]//In F. Swetz et al (Eds.) ,Learn from the Masters. Washington: The Mathematical Asso- ciation of America, 1997.
2Smith,D. E. The law of exponents in the works of the sixteenth century [M]//In C. G. Knott(Ed. ), Napier Tercentenary Memorial Vol- ume. London: Longmans, Green : Company, 1915.