Tsvetkova Д. A lesson on applying the scalar product of two vectors. Mathematics and Education in Mathematics, [S. l.], v. 52, p. 198–201, 2023. DOI: 10.55630/mem.2023.52.198-201. Disponível em: https://smb.math.bas.bg/mem/index.php/memjournal/article/view/86. Acesso em: 6 oct. 2026.