Found in articles
Mechanics, Ch. 1: The Tools of Calculus", Princeton Univ. Press, 2004. Cliff Pickover. (2003). ISBN 978-0-471-26987-8 Calculus and Pizza: A Math Cookbook
Encountering Extraterrestrials. Berlin: Springer. ISBN 978-0-387-28598-6. Pickover, Cliff (2003). The Science of Aliens. New York: Basic Books. ISBN 978-0-465-07315-3