Abdulmunim Shakir Al-Duri. “Enigma Evolution &Amp; Cryptanalysis”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 14 (December 5, 2021): 5566–5569. Accessed May 3, 2024. https://turcomat.org/index.php/turkbilmat/article/view/11687.