1. Barton N (2002) Some new Q-value correlations to assist in site characterisation and tunnel design. Int J Rock Mech Min Sci 39(2):185–216. https://doi.org/10.1016/S1365-1609(02)00011-4
2. Basahel H, Mitri H (2017) Application of rock mass classification systems to rock slope stability assessment: a case study. J Rock Mech Geotech Eng 9(6):993–1009. https://doi.org/10.1016/j.jrmge.2017.07.007
3. Bieniawski ZT (1973) Engineering classification of jointed rock masses. South African Institute of Civil Engineers, Midrand, South Africa
4. Bieniawski ZT (1989) Engineering rock mass classifications: a complete manual for engineers and geologists in mining, civil, and petroleum engineering. John Wiley & Sons, New York
5. Celada B, Tardaguila I, Varona P, Rodriguez A, Bieniawski ZT (2014) Innovating tunnel design by an Improved Experience-based RMR system. In: Proceedings of the World Tunnel Congress 2014 – Tunnels for a better Life. Foz do Iguaçu, Brazil. Geocontrol S.A., Madrid, Spain