[1] Digital Library of Mathematical Functions: Continuous Phase Mapping, http://dlmf.nist.gov/help/vrml/aboutcolor#S2, Retrieved 2016.
[2] F. A. Farris, Visualizing complex-valued functions in the plane, AMC, 10 (1997).
[3] D. J. Velleman, The fundamental theorem of algebra: A visual approach,The Mathematical Intelligencer, 37 (2015) 12–21.
[4] E. Wegert, Visual Complex Functions: An Introduction with Phase Portraits, Springer Basel, 2016 pp. 29.
[5] G. Abdo, P. Godfrey, Plotting functions of a complex variable: Table of Conformal Mappings Using Continuous Coloring, 1999.
[6] http://w.american.edu/cas/mathstat/lcrone/colorsch.html.
[7] R. Behari, H. Gupta, Theory of Equations, 1959.
[8] Collins English Dictionary - Complete, Unabridged 2012 Digital Edition © William Collins Sons, Co. Ltdو 1979, 1986 © Harper-Collins.
[9] س. شهشانی, حساب دیفرانسیل و انتگرال، 2، چاپ ششم، (1393).
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