• Effective optimization of billboard ads based on CDR data leverageSemassel, Imed Eddine; Ben Yahia, SadokJournal of Telecommunications and the Digital Economy2022 / p. 76-95 https://doi.org/10.18080/jtde.v10n2.527 https://www.scopus.com/sourceid/21100795207 https://www.scopus.com/record/display.uri?eid=2-s2.0-85134368696&origin=resultslist&sort=plf-f&src=s&sid=77568ed28944046cd84a4c996cd6fd6c&sot=b&sdt=b&s=TITLE-ABS-KEY%28%22based+on+cdr+data+leverage%22%29&sl=31&sessionSearchId=77568ed28944046cd84a4c996cd6fd6c&relpos=0