Ekhad SB, Zeilberger D. The Number of Solutions of $X^2=0$ in Triangular Matrices Over $GF(q)$. Electron. J. Combin. [Internet]. 1995Dec.1 [cited 2026Mar.31];3(1):R2. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v3i1r2