Hydrotherapy with using citrate buffer system in treatment of senile xerosis Marina Ufimtseva, Kseniya Sorokina, Nadezhda Belokonova, Yurii Bochkarev and Ekaterina Mylnikova BIO Web Conf., 22 (2020) 02018 Published online: 06 July 2020 DOI: 10.1051/bioconf/20202202018