1. Sirén F. 1983. Energiskogsodling. Nämnden för energiskogsodling. Rep. NE 1983:11. Stockholm. 255 pp
2. Biomass production by irrigated and fertilized Salix clones;Christersson;Biomass,1987
3. Elowson S., Christersson L. 1994. Purification of groundwater using bilogical filters. In: Willow vegetation filters for municipal wastewaters and sludges. A biological purification system. Aronsson P, Perttu K, editors. Rapport 50. Swed. Univ. Agric. Sci., Dept Ecol. Environm. Res. Uppsala. ISSN 0282-6267
4. Growth and nutrition of three Salix clones in low conductivity solutions;Ericsson;Physiol. Plant.,1981
5. Leaching of nitrate from arable land into groundwater in Sweden;Gustafsson;Environ. Geology,1983