ZAPOROZHETS, Oleh V. MODERN DEMONSTRATION DEVICES AT LESSONS OF PHYSICS IN SENIOR SCHOOL: THE PENDULUM WITH VARIABLE G. Information Technologies and Learning Tools, [S. l.], v. 4, n. 3, 2010. DOI: 10.33407/itlt.v4i3.173. Disponível em: https://journal.iitta.gov.ua/index.php/itlt/article/view/173.. Acesso em: 18 jun. 2024.