A simple lower bound of estimating of the checking symbols quantity. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, [S. l.], n. 46, p. 100–104, 2011. DOI: 10.20535/RADAP.2011.46.100-104. Disponível em: https://radap.kpi.ua/radiotechnique/article/view/339. Acesso em: 8 apr. 2025.