Lozanov, Chavdar, and Gergana Eneva. 1993. “On the Geometry of Subgroups of Suzuki Group in Finite Non-Miquelian Inversive Planes”. Ann. Sofia Univ. Fac. Math. And Inf. 85 (December):49-54. https://annual.uni-sofia.bg/index.php/fmi/article/view/453.