1. Asman, W.A.H. and Janssen, A.J. 1986. A long range transport model for ammonia and ammonium for Europe, and some model experiments. IMOU Report R-86–6, Rijksuniversiteit Utrecht (NL), pp. 79.
2. Batifol, F. and Boutron, C.F. 1984. Atmospheric heavy metals in high altitude surface snows from Mt Blanc, French Alps. Atmos. Environ. 18 (11), 2507–2515.
3. Boutron, C. 1979a. Alkali and alkaline earth enrichments in aerosols deposited in Antarctic snows. Atmos. Environ. 13, 919–924.
4. Boutron, C. 1979b. Trace element content of Greenland snows along an east-west transect. Geochim. et Cosmochim. Acta 43, 1253–1258.
5. Briat, M. 1978. Evaluation of levels of Pb, V, Cd, Zn and Cu in the snow of Mt Blanc during the last 25 years. In: Studies in Environmental Science, Vol 1., 225–228.