References
- Churchill RV. Operational mathematics. 2nd ed. New York: McGraw-Hill; 1958.
- Nagle RK, Saff EB, Snider AD. Fundamentals of ordinary differential equations. 8th ed. Boston (MA): Addison-Wesley; 2012.
- Bronson R. Schaum’s outline of theory and problems of differential equations. 2nd ed. New York: McGraw-Hill; 1994.
- Boyce WE, DiPrima RC. Elementary differential equations and boundary value problems. 7th ed. Hoboken (NJ): Wiley; 2003.
- Ince EL. Ordinary differential equations. Reprint of the 1926 ed. New York: Dover; 1956.
- Olmsted JHM. Advanced calculus. New York: Appleton-Century-Crofts; 1961.
- Cartan H. Elementary theory of analytic functions of one or several complex variables. Reading (MA): Addison-Wesley; 1963.
- Gkioulekas E. Zero-bounded limits as a special case of the squeeze theorem for single-variable and multivariable limits. Internat. J. Math. Educ. Sci. Technol., to appear.
- Dobbs DE, Hanks R, Weinstein M. A modern course on the theory of equations. 2nd ed. Washington (NJ): Polygonal; 1992.