R. E. Langer (1937). "Rene Descartes". The American Mathematical Monthly. Mathematical Association of America. 44 (8): 495–512. doi:10.2307/2301226. Unknown parameter |month= ignored (bantuan)
doverpublications.com
store.doverpublications.com
Descartes, René (1954). The geometry of René Descartes. Courier Dover. m/s. 95. ISBN0486600688. External link in |publisher= (bantuan)
wikipedia.org
en.wikipedia.org
Descartes, René (1954). The geometry of René Descartes. Courier Dover. m/s. 95. ISBN0486600688. External link in |publisher= (bantuan)
R. E. Langer (1937). "Rene Descartes". The American Mathematical Monthly. Mathematical Association of America. 44 (8): 495–512. doi:10.2307/2301226. Unknown parameter |month= ignored (bantuan)