Martínez Frías, J., Millán, M.M., García, N., López Vera, F., Delgado, A., Gracía, R., Rodríguez Losada, J.A., Reyes, E., Martín, J.A., Gómez Coedo, A. 2001. Compositional heterogeneity of Hailstones: Atmospheric conditions an possible enviromental implications. AMBIO, 30:450-452. [2001ART18].