“Investigating Risk Factors in Tender Process Effecting on Contract Implementation Stage in Onshore Oil and Gas Production Facilities Projects”. International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) DOI: 10.31695 IJERAT, vol. 5, no. 12, Dec. 2019, pp. 08-27, https://doi.org/10.31695/IJERAT.2019.3584.