Kuznetsov, Yuri, and Maria Ermoshina. “Does the Use of Black Ink Still Comprise the ‘darkest’ Issue of CMYK Printing?”. Journal of Print and Media Technology Research 5, no. 3 (October 9, 2023): 231–238. Accessed September 1, 2024. https://jpmtr.org/index.php/journal/article/view/120.