Lupak O, Kovalchuk H, Antonyak H. Potentiometric determination of antioxidant activity of extracts of Calendula Officinalis L. plants under the influence of growth biostimulants. ScienceRise: Biological Science [Internet]. 2017Dec.31 [cited 2024May21];(6 (9):10-3. Available from: https://journals.uran.ua/sr_bio/article/view/119086