TY JOUR TI Mathematical modeling nonstationarity of biotechnological production of lactic acid: stability KW The work was carried out with the financial support of Mendeleev University of Chemical Technology JO Vestnik of Astrakhan State Technical University AU Gordeeva, Y.. AU Borodkin, A.. AU Gordeeva, E.. AU Komissarov, Y.. PY 2021 IS 2021 PB Astrakhan State Technical University