J. Fortuño-Godes, L. Fanega-Macías, J. C. Burriel-Paloma, and M. Guerra-Balic, “Descriptive Notes on Supply and Demand of Public Facilities for Elderly Physical Activities in the City of L’Hospitalet de Llobregat”, RASP, vol. 3, no. 1, pp. 64–84, Jul. 2015.