Цих, В. С., and А. В. Яворський. “THE EXPERIMENTAL VERIFICATION OF A COMPLEX APPROACH USAGE FOR THE BURIED OIL AND GAS PIPELINES INSULATED COATING DEFECTS DETECTION AND IDENTIFICATION”. Oil and Gas Power Engineering, no. 2(20), Nov. 2013, pp. 92-100, https://nge.nung.edu.ua/index.php/nge/article/view/243.