Biblio
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1997
W. G. McCallum, Flath, D. E., Gleason, A. M., Gordon, S. P., Mumford, D., Osgood, B. G., Hughes-Hallett, D., Quinney, D., Raskind, W., Tecosky-Feldman, J., Thrash, J. B., and Tucker, T. W.,
Multivariable Calculus. Wiley, 1997, p. 503.
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