On The Lattie Of Subgroup Of The Group Of Upper Triangular Matrices Of Matrix Group. International Journal of Environmental Sciences, [S. l.], p. 878–900, 2025. DOI: 10.64252/qac94123. Disponível em: https://theaspd.com/index.php/ijes/article/view/2261.. Acesso em: 18 sep. 2026.