حسن عبدالسلام علي عمران و مسعود سالم علي نصر أبونجيم. “The Role of Strategic Vigilance in Achieving Strategic Success Field Study at Libyana Mobile Phone Company Sabha”. Journal of Pure & Applied Sciences, vol. 18, no. 2, Nov. 2019, doi:10.51984/jopas.v18i2.411.