%0 Journal Article %T NUMERICAL CALCULATION OF NONSTATIONARY FRACTIONAL DIFFERENTIAL EQUATION IN PROBLEMS OF MODELING TOXIC SUBSTANCES DISTRIBUTION IN GROUND WATERS %A Afanasyeva, A.. %A Shvetsova-Shilovskaya, T.. %A Ivanov, D.E. %A Nazarenko, D.. %A Kazarezova, E.. %K fractional derivative, time derivative, fractional differential equation, difference scheme, groundwater %J Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics %D 2019 %N %P 10 %I Astrakhan State Technical University