Kauffman, R. M., Read, T. T., & Zettl, A. (1977). The deficiency index problem for powers of ordinary differential expressions Robert M. Kauffman, Thomas T. Read, Antol Zettl. Springer-Verlag. https://doi.org/10.1007/BFb0064277
Chicago Style (17th ed.) CitationKauffman, R. M., Thomas Thornton Read, and Anton Zettl. The Deficiency Index Problem for Powers of Ordinary Differential Expressions Robert M. Kauffman, Thomas T. Read, Antol Zettl. Berlin ; New York: Springer-Verlag, 1977. https://doi.org/10.1007/BFb0064277.
MLA (9th ed.) CitationKauffman, R. M., et al. The Deficiency Index Problem for Powers of Ordinary Differential Expressions Robert M. Kauffman, Thomas T. Read, Antol Zettl. Springer-Verlag, 1977. https://doi.org/10.1007/BFb0064277.
Warning: These citations may not always be 100% accurate.