Hung, N. V., L. Gerbaud, R. Souchal, C. Urbanczyk, and C. Fouchard. “Penetration Rate Prediction for Percussive Drilling With Rotary in Very Hard Rock”. Vietnam Journal of Science and Technology, vol. 54, no. 1, Feb. 2016, pp. 133-49, doi:10.15625/0866-708X/54/1/5956.