Mulev, M., L. Grupče, L. Melovski, and L. Derlieva. “Mineral Matters Content in the Organs of the Species Quercus Frainetto and Quercus Cerris in the Ass. Quercetumfrainetto-Cerris Macedonicum Oberd. 1948, Em. Horvat 1959 in „Galičica,, National Park”. Macedonian Journal of Ecology and Environment, vol. 2, no. 1, Aug. 1994, pp. 37-46, https://mjee.org.mk/index.php/mjee/article/view/14.