V. V. Tkach
Chernovitsky national University, Ukraine
Ukraine

C. S. de Oliveira
Federal University of state of Mato Grosso do Sul, Brazil
Brazil

J. Maia
Federal University of state of Mato Grosso do Sul, Brazil
Brazil

B. G. Soares
Federalny the state University of Rio de Janeiro, Brazil
Brazil

R. Ojani
University of Mazandaran, Islamic Republic of Iran
Iran, Islamic Republic of

P. I. Yagodynets
Chernovitsky national University, Ukraine
Ukraine