Hirsch, M. W. (1997). Differential topology (Corr. 6th print.). New York: Springer.
Trích dẫn kiểu ChicagoHirsch, Morris W. Differential Topology. Corr. 6th print. New York: Springer, 1997.
Deismireacht MLAHirsch, Morris W. Differential Topology. Corr. 6th print. New York: Springer, 1997.
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