Russia

Velikiy

P.

Institute of Agrarian Problems RAS, Saratov

,

410012, Saratov, Moskovskaya str., 94

Nechaeva

Irina

Vladimirovna

Institute of Agrarian Problems RAS, Saratov

,

410012, Saratov, Moskovskaya str., 94

Mogilevich

Branislava

R.

Saratov State University

,

Russia, Saratov, Astrakhanskaya 83

Ufimceva

Е.

I.

Saratov State University

,

Russia, Saratov, Astrakhanskaya 83

Koshelev

А.

Saratov State University

,

Russia, Saratov, Astrakhanskaya 83

Besschetnova

О.

V.

Balashov Institute (branch) of the Saratov State University named after N.G. Chernyshevsky

,

412300, Saratov Region, Balashov, Karl Marx str., 29

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