García García, J. M., M. D. Romacho, y A. Jiménez. «The corner frequencies, stress drops and apparent stresses of microearthquakes in the betic region (southern spain)». Física de la Tierra, vol. 14, vol. 14, 2002, pp. 161-82, https://revistas.ucm.es/index.php/FITE/article/view/FITE0202110161A.