N. Volkov, I. Sokolov, and R. Jewell, “Investigation by Cone Penetration Tests of Piled Foundations in Frozen Soil Maintained by Thermosyphons”, ASRJETS-Journal, vol. 31, no. 1, pp. 40–58, Apr. 2017, Accessed: Nov. 13, 2025. [Online]. Available: https://asrjetsjournal.org/American_Scientific_Journal/article/view/2909