Wang, Q.
and Saunders, B.
(1999),
Interactive 3D Visualization of Mathematical Functions Using VRML, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=151389
(Accessed October 11, 2024)