The content of macro and micronutrients in dried needles and branches of Macedonian pine (Pinus peuce Griseb., Pinaceae) v.s. their content in the plant residue after distillation of essential oil, - M. Karapandzova, Gj. Stefkov, T. Stafilov, K. Bačeva, S. Kulevanova (My University, 2011)