ISBN 0-688-06910-X. OCLC 15223648. Ulam, Stanislaw. Adventures of a Mathematician. New York: Charles Scribner's Sons. 1976. ISBN 0-520-07154-9. OCLC 1528346
Leo Graetz(英语:Leo Graetz). The 格里望遠鏡 is named after James Gregory(英语:James Gregory (mathematician)), who published it in 1663, but was already known to