Shcherbakov, S. Y., I. P. Krivolapov, and P. S. Lazin. “Drying Hawthorn Berries in Drum Dryer Using Blade Agitator”. Amazonia Investiga, vol. 8, no. 21, Aug. 2019, pp. 588-95, https://amazoniainvestiga.info/index.php/amazonia/article/view/139.