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2. Commission Regulation (EEC) No.1696/1987 laying down certain detailed rules for the 1987. Official Journal of the European Communities, No. L161/1 of 22 June 1987, p. 22.
3. Council Regulation (EEC) No.3528/1986 on the protection of forests in the Community against atmospheric pollution. Brussels: 1986. Official Journal of European Communities No. L362/2 of 21 Nov. 1986, p. 3.
4. Landman, G., 1991. Forest decline in France. DEFORPA Program. Cited by Patrascoiu N., Badea O., In Study on forest health dynamic in Romania, 1993. ICAS Bucuresti, p. 15.
5. Lorenz, M., Augustin, S., Becher, G., Forster, M., Muller-Edzards, Ch., 1998. Forest Condition in Europe in 1997. Scheme UE and ICP Forests (UN/ECE-EC), Brussels, Geneva.