Nath, Prem. “Some Functional Equations Arising from the Concept of Unexpectedness of an Event in Information Theory”. Journal of Informatics and Mathematical Sciences 3, no. 1 (April 30, 2011): 41–54. Accessed May 2, 2024. https://www.rgnpublications.com/journals/index.php/jims/article/view/41.