Primjerice: Zu den F Projektoren in endlichen Gruppen, Glasnik matematički, 17 (37) (1982), 11 - 17; A Theorem on Finite Projective Planes od Order and an Application to Planes of Order 15, Archiv der Math. (Basel), 41, (1983) 280 288; Some New Partially Symetric Designs and their Resolution, Rend.