Changes in the content of carotenoids and flavonoids in medicinal raw material of Digitalis Purpurea, Polemonium Caeruleum, and Aerva Lanata, cultivated in vitro under the chronic action of ionizing radiation - S. V. Litvinov; L. H. Loshyna; O. V. Bulko; K. V. Lystvan; S. A. Pchelovska (Nuclear physics and atomic energy, 2021)