Merna Adel Aziz & R.N. Butris. (2007). The existence and approximation of the periodic solutions for system of second order nonlinear differential equationsby using Lebesgue integrable. College of Education for Pure Sciences.
Chicago Style (17th ed.) CitationMerna Adel Aziz and R.N. Butris. The Existence and Approximation of the Periodic Solutions for System of Second Order Nonlinear Differential Equationsby Using Lebesgue Integrable. College of Education for Pure Sciences, 2007.
MLA (9th ed.) CitationMerna Adel Aziz and R.N. Butris. The Existence and Approximation of the Periodic Solutions for System of Second Order Nonlinear Differential Equationsby Using Lebesgue Integrable. College of Education for Pure Sciences, 2007.
Warning: These citations may not always be 100% accurate.