Vrancheva, Radka, 		Ivanov, Ivan, 		Badjakov, Ilian, 		Dincheva, Ivayla, 		Georgiev, Vasil, AND 		Pavlov, Atanas.
" Optimization of polyphenols extraction process with antioxidant properties from wild Vaccinium myrtillus L. (bilberry) and Vaccinium vitis-idaea L. (lingonberry) leaves" <em>Food Science and Applied Biotechnology</em> [Online], Volume 3 Iss. 2 (10 October 2020)