O. O. Dykhovychnyi and N. V. Kruglova, “IMITATIONAL MODELING AND ANALYSIS OF MATRIXES CONTAINING PRIMARY GRADING OBTAINED IN EDUCATIONAL TESTING BY THE MEANS OF LANGUAGE R”, ITLT, vol. 67, no. 5, pp. 148–160, Oct. 2018, doi: 10.33407/itlt.v67i5.2104.