A. Sondore, V. Beinaroviča, E. Krastiņa, and P. Daugulis, “IMPROVING METHODIC COMPETENCE OF PRIMARY SCHOOL MATHEMATICS TEACHERS ON SELF-DIRECTED LEARNING IN LATVIA”, SIE, vol. 2, pp. 583–593, May 2021, doi: 10.17770/sie2021vol2.6361.