Voynova, Nikolina, and Nikolina Valkanova. “STUDY OF THE NUTRITION OF CHILDREN AND STUDENTS IN ORGANIZED COLLECTIVES IN THE SILISTRA REGION FOR 2019-2022”. KNOWLEDGE - International Journal , vol. 62, no. 4, Feb. 2024, pp. 533-9, https://ojs.ikm.mk/index.php/kij/article/view/6629.