يوسفات, Boudi , abdelkader و Bouanini, samiha 2021. An effective vigilance for a competitive enterprise The Vigilance and the Competitiveness reality in the Public Enterprise for Public Works (EPTP). مجلة النمو الاقتصادي والمقاولاتية . 4, 5 (2021), 61-70. DOI:https://doi.org/10.5281/10.5281/zenodo.4482060.