Zhdanov, R. Z., and V. I. Lagno. “On New Realizations of the Poincare Groups <em class="a-Plus-plus">P</em> (1,2) and <em class="a-Plus-plus">P</Em&gt;(2, 2)”. Ukrains’kyi Matematychnyi Zhurnal 52, no. 4 (April 25, 2000): 447-462. Accessed May 18, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4436.