1. Pinto da Cunha A. (1993). Scale effects in rock engineering Pinto da Cunha ed. Balkema Rotterdam The Netherlands 3–14.
2. Pinto da Cunha A. and Muralha J. (1990). “About LNEC experience on scale effects in the deformability of rock masses.” Scale effects in rock masses Pinto da Cunha ed. Balkema Rotterdam The Netherlands 219–229.
3. Jackson R. and Lau J. S. O. (1990). “The effect of specimen size on the laboratory mechanical properties of Lac du Bonnet grey granite.” Scale effects in rock masses Pinto da Cunha ed. Balkema Rotterdam The Netherlands 165–174.
4. Leal Gomes M. J. (1995). “Evaluation of characteristics and coefficients determining the scale effects in jointed rock masses.” Mechanics of jointed and faulted rock Rossmanith ed. Balkema Rotterdam The Netherlands 125–130.
5. Bieniawski Z. T. (1976). “Rock mass classification in rock engineering.” Proc. Symp. for the Exploration of rock engineering Bieniawski ed. Balkema Rotterdam The Netherlands 97–106.