Radionova M.V., Korzukhin A.A., Saushev N.A. Mathematical methods of financial transaction evaluation for fraud // Vestnik Permskogo universiteta. Seria Ekonomika = Perm University Herald. Economy. 2021, vol. 16, no. 1, pp. 54-66. doi: 10.17072/1994-9960-2021-1-54-66