Maruschak P, Prentkovskis O, Bishchak R. Defectiveness of external and internal surfaces of the main oil and gas pipelines after long-term operation. JCEM [Internet]. 2016Mar.1 [cited 2024Oct.3];22(2):279-86. Available from: https://jau.vgtu.lt/index.php/JCEM/article/view/1294