Kareem Abdullah, Habeeb, and Inam Farhan Adhab. “Strongly Regular Palais Proper G – Space”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 6, no. 2, Aug. 2017, pp. 30-43, https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/103.