Dimitar Dimitrov, Albena Parjanova, Snezhana Ivanova, and Vanyo Haygarov. “DETERMINATION OF THE VOLATILE COMPOSITION OF DISTILLATES WITH ADDED EXTRACTS OF HIPERICUM PERFORATYM L”. Journal of Microbiology, Biotechnology and Food Sciences, vol. 9, no. 6, Mar. 2021, pp. 1068-72, https://office2.jmbfs.org/index.php/JMBFS/article/view/4502.