V. M. Merlavsky
Ivan Franko National University of Lviv Ukraine
R. D. Ostapiv
Ivan Franko National University of Lviv
State Scientific-Research Control Institute of Veterinary Medicinal Products and Feed Additives Ukraine
O. V. Ikkert
Ivan Franko National University of Lviv Ukraine
V. V. Manko
Ivan Franko National University of Lviv Ukraine