Study Conditions of Center of Gravity for Trivial Solution to Semi Linear Differantial Equation of Third Order in The One Critical Cases. RJCSM [Internet]. 2013 Jun. 12 [cited 2026 Jun. 25];10(2):13-2. Available from: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36462