Zavhorodnii , Andrii, Viktor Bilushko, Anatoliy Paliy, Mykola Kalashnyk, Natalia Kalashnyk, and Andriy Paliy. “Freeze-Drying Improved the Stability of Tuberculin Purified Protein Derivative (PPD) in Mammals”. Problems of Cryobiology and Cryomedicine 32, no. 1 (June 3, 2022): 63–67. Accessed November 23, 2024. https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/1780.