LEPPÄLÄ, K. On semi-orthogonal matrices with row vectors of equal lengths. Annales Fennici Mathematici, [S. l.], v. 49, n. 2, p. 621–629, 2024. DOI: 10.54330/afm.152122. Disponível em: https://afm.journal.fi/article/view/152122. Acesso em: 4 dec. 2024.