Blum, W. E. ., J. Schiefer, and G. J. . Lair. “EUROPEAN LAND QUALITY AS A FOUNDATION FOR THE SUSTAINABLE INTENSIFICATION OF AGRICULTURE”. Radovi Šumarskog Fakulteta Univerziteta U Sarajevu, vol. 21, no. 1, Oct. 2016, pp. 9-13, doi:10.54652/rsf.2016.v1.i1.279.