BAKIR, Aydin, and Vural YAVUZ. “The Role of Horizontal Probe Drill Data in Tunnel Excavations: A Case Study from Istanbul Bosphorus Tunnel”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 57, no. 1, Apr. 2021, pp. 112-29, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/12336.