Normal discrete orthogonal transformation. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, [S. l.], n. 37, p. 8–15, 2008. DOI: 10.20535/RADAP.2008.37.8-15. Disponível em: https://radap.kpi.ua/radiotechnique/article/view/165. Acesso em: 14 mar. 2025.