1. Betters, D. Wright, L.L., and Couto, L.: 1992, Short Rotation Woody Crop Plantations in Brazil and the United States,Biomass and Bioenergy 1(6), 305?316.
2. Brandle, J.R., Wardle, T.D., and Bratton, G.F.: 1992, Opportunities to Increase Tree Planting in Shelterbelts and the Potential Impacts on Storage and Conservation, in Sampson, R.N. and Hair, D., eds.,Forests and Global Change, Volume 1: Opportunities for Increasing Forest Cover, Washington, DC:American Forests, pp. 157?176.
3. Burschel, P., Kürsten, E., and Larson, B.C.: 1993, Die Rolle von Wald und Forstwirtschaft im Kohlenstoffhaushalt ? Eine Betrachtung für die Bundesrepublik Deutschland, Forstl. Forschungsberichte München, Nr. 126, (short version in English).
4. Dixon, R.K., Andrasko, K.J., Sussman, F.A., Trexler, M.C. and Vinson, T.S.: 1993, this volume.
5. Farnum, P., Timmis, R. and Kulp, J.L.: 1983, Biotechnology of Forest Yield,Science 219, 694?702.