Maruschak, P., Prentkovskis, O. and Bishchak, R. 2016. Defectiveness of external and internal surfaces of the main oil and gas pipelines after long-term operation. Journal of Civil Engineering and Management. 22, 2 (Mar. 2016), 279-286. DOI:https://doi.org/10.3846/13923730.2015.1100672.