1. Dang MC (2013) Lithological characteristics of turbidite in the Co To (O-Sct) formation and their geodynamic significance. Doctoral dissertation, p 114
2. Dovzhikov AE, Bui Fu MI, Vasilevskaya ED (1965) Geology of north Viet Nam. Publishing House for Science and Technology, Hanoi, p 668
3. Goodman RE (1976) Methods of geological engineering in discontinuous rocks. West Publishing Co, St Paul
4. Hoek E, Bray JW (2004) Rock slope engineering. Taylor & Francis Group, New York, p 431
5. Kulatilake PHSW, Wathugala DN, Poulton M, Stephansson O (1990) Analysis of structural homogeneity of rock masses. Eng Geol 29(3):195–211