Přívětivý, Aleš. “Discrepancy of Sums of Three Arithmetic Progressions”. The Electronic Journal of Combinatorics 13, no. 1 (January 25, 2006): #R5. Accessed April 12, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v13i1r5.