Azcárraga, J. A. de, and J. M. Izquierdo. “Topics on N-Ary Algebraic Structures”. Acta Polytechnica 50, no. 3 (January 3, 2010). Accessed June 27, 2025. https://ojst.is.cvut.cz/ojs/index.php/ap/article/view/1179.