Ulmanu , V., Zisopol , D. и Trifan , C. (2007) Experimental research concerning the influence of external diameteron the behavior of coiled tubing to cyclic bending with internal pressure, Записки Горного института, 170(2), сс. 46-48. доступно на: https://pmi.spmi.ru/pmi/article/view/7711 (просмотрено: 13 май 2025).

Ulmanu , V., Zisopol , D. and Trifan , C. (2007) “Experimental research concerning the influence of external diameter on the behavior of coiled tubing to cyclic bending with internal pressure”, Journal of Mining Institute, 170(2), pp. 46-48. Available at: https://pmi.spmi.ru/pmi/article/view/7711 (Accessed: 13 May 2025).