ProkipV. M. “Canonical Form With Respect to Semiscalar Equivalence for a Matrix Pencil With Nonsingular First Matrix”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 63, no. 8, Aug. 2011, pp. 1147-52, https://umj.imath.kiev.ua/index.php/umj/article/view/2793.