On November 11, 1675, German mathematician and polymath Gottfried Wilhelm Leibniz demonstrates integral calculus for the first time to find the area under the graph of y = ƒ(x).
D. Dominici, P. Gill, и T. Limpanuparb. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Science, 468 (2145):
2667-2681(сентября 2012)