Näsholm, T. (1991). Aspects of nitrogen metabolism in Scots pine, Norway spruce and birch as influenced by the availability of nitrogen in pedosphere and atmosphere. Swedish University of Agricultural Sciences, Dept. of Forest Genetics and Plant Physiology.
Παραπομπή σε μορφή Chicago (17η εκδ.)Näsholm, Torgny. Aspects of Nitrogen Metabolism in Scots Pine, Norway Spruce and Birch as Influenced by the Availability of Nitrogen in Pedosphere and Atmosphere. Umeå: Swedish University of Agricultural Sciences, Dept. of Forest Genetics and Plant Physiology, 1991.
Παραπομπή σε μορφή MLA (8th εκδ.)Näsholm, Torgny. Aspects of Nitrogen Metabolism in Scots Pine, Norway Spruce and Birch as Influenced by the Availability of Nitrogen in Pedosphere and Atmosphere. Swedish University of Agricultural Sciences, Dept. of Forest Genetics and Plant Physiology, 1991.