* Ball, W. W. Rouse. "Gottfried Wilhelm Leibnitz (1646 - 1716)," in Ball, ''A Short Account of the History of Mathematics'' (4th edition, 1908) [http://www.maths.tcd.ie/pub/HistMath/People/Leibniz/RouseBall/RB_Leibnitz.html online edition] | * Ball, W. W. Rouse. "Gottfried Wilhelm Leibnitz (1646 - 1716)," in Ball, ''A Short Account of the History of Mathematics'' (4th edition, 1908) [http://www.maths.tcd.ie/pub/HistMath/People/Leibniz/RouseBall/RB_Leibnitz.html online edition] |