(1)
IGNATOV, I.; VALCHEVA, N.; POPOVA, T. P.; NESHEV, N.; HUETHER, F.; IGNATOV, A. I. PHYSICOCHEMICAL AND MICROBIOLOGICAL RESULTS FROM HOT MINERAL WATER IN THE VILLAGE OF VARVARA, DISTRICT OF PAZARDZHIK, BULGARIA. UPJOZ 2022, 43, 31-40.