1. Metal levels in indoor and outdoor dust in Riyadh, Saudi Arabia;Al-Rajhi;Environmental International,1996
2. La limpieza viaria: desconocida e incontrolable;Álvaro;Residuos,2007
3. Ball, J., Jenks, R., Aubourg, D. (1996). Dry weather build-up of constituents on road surfaces. In Proceedings of the seventh international conference on urban storm drainage (pp. 785–790). Hanover, Germany.
4. Un análisis de los gastos municipales por el servicio de residuos sólidos urbanos;Bel;Revista de Economía Aplicada,2006
5. Determinants of efficiency in the provision of municipal street-cleaning and refuse collection services;Benito-López;Waste Management,2011