Romero Díaz, A., P. Marín Sanleandro, and A. Sánchez Soriano. “Piping Processes in the Region of Murcia (South-East of Spain)”. Cuadernos De Investigación Geográfica, vol. 35, no. 1, June 2013, pp. 87-117, doi:10.18172/cig.1214.