Azra Souad a and Bouchelaghem Mounia. “Groups With Nilpotent Factor-Group by (polycyclic-by-Černikov ) ”. Journal of Computational Analysis and Applications (JoCAAA), vol. 34, no. 4, Apr. 2025, pp. 980-4, https://eudoxuspress.com/index.php/pub/article/view/2448.