TECHNICAL EFFICIENCY ANALYSIS OF WHEAT PRODUCERS INKAZAKHSTAN AND RUSSIA: STOCHASTIC FRONTIERAPPROACH. Journal of Media studies, [S. l.], v. 55, n. 2, p. 30–43, 2021. DOI: 10.47344/sdubss.v55i2.526. Disponível em: https://jms.sdu.edu.kz/index.php/jms/article/view/36.. Acesso em: 8 jul. 2025.