1. Bernier, B. and Brazeau, M.: 1988, Can. J. For. Res. 18, 754.
2. Binns, W.O., Redfern, D.B., Boswell, R. and Betts, A.J.A.: 1986, Forest Health and Air Pollut., 1985 Survey, 147.
3. Bonneau, M.: 1986, Programme deforpa, 1-er report. France, 34.
4. Bonte, J.: 1986, Programme deforpa., 1-er report., France, 52.
5. Camirand, R.: 1980, M. Sc. Thesis, Université Laval, Quebec.