Safina G.L., Kirianova L.V., Osipov Yu.V. «ANALISYS OF PATTERNS IN MATHEMATICAL TESTS» // Open and distance education 2017. №4(68) C.17-24
Osipov Yu.V., Safina G.L., Vetuhnovskii F.Ya. «Modeling mathematics tests» // Open and distance education 2016. №3(63) C.69-77
