Lang, S. (1987). Calculus of several variables. New York: Springer-Verlag.
Trích dẫn kiểu ChicagoLang, Serge. Calculus of Several Variables. New York: Springer-Verlag, 1987.
Deismireacht MLALang, Serge. Calculus of Several Variables. New York: Springer-Verlag, 1987.
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