Chapter IV. Manuscripts of the period 1673-1675. in The early mathematical manuscripts of Leibniz, translated from the Latin texts published by Carl Immanuel Gerhardt, with critical and historical notes, by J.M. Child. (Open Court, 1920. Dover, 2005). pp. 58-114.
Leibniz, Gottfried Wilhelm, "Manuscripts of the period 1673-1675" (1673). 2015, October 16-17 ORESME Reading Group Meeting. 1.
From: Leibniz, Gottfried W, and J M. Child. The Early Mathematical Manuscripts of Leibniz. Mineola, N.Y: Dover Publications, 2005. Print. Reprint of the original 1920 Open Court publication.