VAKULCHIK, V., and A. KAPUSTO. 2012. “SISTEMATIC AND SCIETIFICALY ORGANIZED CONTROL, AS A CRUCIAL ELEMENT IN THE PROCESS OF TEACHING MATHEMATICS IN TECHNICAL SPECIALTIES”. Vestnik of Polotsk State University. Part E. Pedagogic Sciences, no. 7 (May):68-75. https://journals.psu.by/pedagogical/article/view/10074.