Martinez Frias, J., Delgado, A., Millan, M., Reyes, E., Rull, F., Travis, D., Garcia, R., Lopez Vera, F., Rodriguez Losada, J.A., Martin Rubi, J.A., Raya, J., Santoyo, E. 2005. Oxygen and hydrogen isotopic signatures of large atmospheric ice conglomerations. J ATMOS CHEM, 52:185-202.