Mcintosh , Richard William, and Balázs Encs. “Rock Mass Rating in Bükk Mts., N Hungary Based on Petrophysical Parameters and Parting Conditions”. Acta Geographica Debrecina Landscape & Environment Series, vol. 10, no. 3-4, Sept. 2016, pp. 161-8, https://doi.org/10.21120/LE/10/3-4/9.