HRISTOVA, DENITSA, et al. “COLOUR PARAMETERS OF FRESH AND DRIED PLUM FRUIT OF CULTIVAR ‘TEGERA’, AFTER APPLICATION OF SOME CONVENTIONAL AND ORGANIC FERTILIZERS”. Bulgarian Journal of Agricultural Science, vol. 24, no. Supplement 2, Dec. 2018, pp. 48-51, https://agriacad.eu/ojs/index.php/bjas/article/view/5048.