Kathim A. H, Wafaa M. Taha. The Distribution of Zeros of the Solutions of Linear Homogeneous Differential Equations of the Sixth Order Using Semi-critical Intervals. Tikrit J. Pure Sci. [انترنت]. 5 فبراير، 2023 [وثق 18 مايو، 2024];21(3):162-5. موجود في: https://tjps.tu.edu.iq/index.php/tjps/article/view/1010