H. Ismail, Tahir, طاهر, Ibrahim O. Hamad, إبراهیم, Sami A. Hussein, and سامی. 2025. “Pθ-Topological Groups in Nonstandard Analysis”. AL-Rafidain Journal of Computer Sciences and Mathematics 9 (1):191-99. https://rjps.uomosul.edu.iq/index.php/csmj/article/view/19677.