Pitschmann, V. “A Simple Spectrophotometric Determination of Cyanides by P-Nitrobenzaldehyde and Tetrazolium Blue”. Advances in Military Technology 6, no. 2 (February 27, 2022): 19–27. Accessed May 2, 2026. https://www.aimt.cz/index.php/aimt/article/view/1601.