Bielak, Kamil, Małgorzata Dudzińska, and Hans Pretzsch. 2014. “Mixed Stands of Scots Pine (Pinus Sylvestris L.) and Norway Spruce [Picea Abies (L.) Karst] Can Be More Productive Than Monocultures. Evidence from over 100 Years of Observation of Long-Term Experiments”. Forest Systems 23 (3), 573-89. https://doi.org/10.5424/fs/2014233-06195.