“THE INFLUENCE OF THE PERLITE AS A SUBSTRATE FOR IMPROVING ON SOME WATER PROPERTIES ON THE FLUVIAL SOIL WITH AN APLICATION OF RETENTIONAL CURVES”. Journal of Agriculture and Plant Sciences, vol. 16, no. 1, Sept. 2018, pp. 73-82, https://js.ugd.edu.mk/index.php/YFA/article/view/2350.