1.
H. MAHMOOD A, S. KARYAKOS R, H. SAADOON L. Solvability Conditions For A system Of Nonhomogenous Differntial Equations Of The First Order. JES [Internet]. 2008 Jun. 1 [cited 2025 Sep. 10];21(2):150-4. Available from: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42552