“A Simple Lower Bound of Estimating of the Checking Symbols Quantity”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 46 (October 1, 2011): 100–104. Accessed April 3, 2025. https://radap.kpi.ua/radiotechnique/article/view/339.