Spridzans, Martins, and Janis Dzerviniks. “IMPACT OF COVID-19 ON BORDER GUARDS TRAINING IN LATVIA, LITHUANIA, ESTONIA AND FINLAND”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, vol. 5, May 2021, pp. 209-20, https://doi.org/10.17770/sie2021vol5.6335.