@article{003694703, title = "Conversion of pure spruce (Picea abies Karst.) stands into mixed stands by direct-seeding of beech (Fagus sylvatica L.) - effects of canopy density and fine root biomass on seed germination", author = "Ammer, C. and Mosandl, R. and El Kateb, H.", year = "2000", journal = "Forest ecosystem restoration ecological and economical impacts of restoration processes in secondary coniferous forests Proceedings of the International Conference, Vienna, Austria,", volume = "10-12 April 2000", pages = "15-18", url = "https://eurekamag.com/research/003/694/003694703.php" }