Simmons, G. F. (2007). Differential equations: Theory, technique, and practice. New York, NY: McGraw-Hill Higher Education.
Trích dẫn kiểu ChicagoSimmons, George Finlay. Differential Equations: Theory, Technique, and Practice. New York, NY: McGraw-Hill Higher Education, 2007.
Trích dẫn MLASimmons, George Finlay. Differential Equations: Theory, Technique, and Practice. New York, NY: McGraw-Hill Higher Education, 2007.
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