García-Guinea, J., Lombardero, M., Roberts, B., Taboada, J. and Peto, A. (1998) “Mineralogy and microstructure of roofing slate: thermo-optical behaviour and fissility”, Materiales de Construcción, 48(251), pp. 37–48. doi: 10.3989/mc.1998.v48.i251.470.