NEW OSCILLATION THEOREMS FOR SECOND ORDER NONLINEAR DIFFERENTIAL EQUATIONS USING THE INTEGRAL AVERAGING TECHNIQUE. edujournal [انترنت]. 14 يناير، 2023 [وثق 8 ديسمبر، 2025];1(1):244-55. موجود في: https://elc2.su.edu.ly/index.php/edujournal/article/view/608