1. Arriaga, C.J., Martı́nez, V.G., Escalona, S.S., Matı́nez, C.H., 1996. Compuestos orgánicos volátiles en la atmósfera de la ZMCM (Volatile organic compounds in the atmosphere of MCMA). El Colegio Nacional, Mexico, D.F., pp. 23–38.
2. Cervantes, A.D., Vega, E., Mugica, V., 1997. Evaluation of a method for the head space analysis in gasoline. V Congreso de Quı́mica de América del Norte, en Cancún, México, November 11–15.
3. Compendium method TO-14, 1988. The determination of volatile organic compounds in ambient air using SUMMA® passive canister sampling and gas chromatography analysis. Quality assurance division environmental monitoring system laboratory, U.S. Environmental Protection Agency. Research Triangle Park, North Carolina 2771. Made 1988.
4. Core, J.E., 1987. Receptor Modelling: Student Guidebook. US Environmental Protection Agency, APTI SI–424.
5. Departamento del Distrito Federal, 1996. Programa para mejorar la calidad del aire en el Valle de México 1995–2000 (A program to improve the air quality in the Valley of Mexico 1995–2000), México.