1. Alejano L, Muralha J, Ulusay R, Li, C, Pérez-Rey I, Karakul H, Chryssanthakis P, Aydan Ö (2018) ISRM suggested method for determining the basic friction angle of planar rock surfaces by means of tilt tests. Rock Mech Rock Eng 51(12):3853–3859
2. Aydan Ö 1989 The stabilisation of rock engineering structures by rockbolts. Doctorate Thesis, Nagoya University
3. Aydan Ö (2016) Considerations on friction angles of planar rock surfaces with different surface morphologies from tilting and direct shear tests 6p, Bali, on CD, Paper No.57
4. Aydan Ö (2017) Rock dynamics. CRC Press, Taylor and Francis Group, p 462 (ISRM Book Series No. 3, ISBN 9781138032286)
5. Aydan Ö (2020) Rock mechanics and rock engineering: volume 1-fundamentals of rock mechanics (p.31). CRC Press, Taylor and Francis Group, p 379