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- Do Carmo ©ÒµÛªº Differential Geometry of Curves and Surfaces ¬°±`¥Îªº±Ð§÷¡C
- H. Hopf ªº¦WµÛ Differential Geometry in the Large ¬°±`¥Îªº°Ñ¦ÒµÛ§@¡C
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