Sellstedt A, Huss-Danell K
Growth, nitrogen fixation and relative efficiency of nitrogenase in Alnus incana grown in different cultivation systems
Plant and Soil: 1984 78:147-158

Fries A
Spacing interaction with genotype and with genetic variation for production and quality traits in a trial of seedlings and grafted clones of Scots pine (Pinus sylvestris L.)
Silvae Genet: 1984 33:145-152
Lindgren D
The Inheritance of Pinifolic-Acid in Scotch Pine Pinus-Sylvestris Needles
Silvae-Genetica: 1984 33:235-237