YANG, C. Y.; HUANG, C.-K. Nearly Reversible ECG Steganography based on Polar Coordinate System with Digital Replacement Technique. Transactions on Machine Learning and Artificial Intelligence, [S. l.], v. 9, n. 6, p. 9–19, 2021. DOI: 10.14738/tmlai.96.11177. Disponível em: https://journals.scholarpublishing.org/index.php/TMLAI/article/view/11177. Acesso em: 21 jan. 2022.