Biplanes (56, 11, 2) with automorphisms of order 4 fixing some point. - Vladimir Cepulic; Mario Essert (Discret. Math., 1988)

Biplanes (56, 11, 2) with automorphism group Z2 × Z2 fixing some point. - Vladimir Cepulic; Mario Essert (J. Comb. Theory A, 1988)

On symmetric block designs (40, 13, 4) with automorphisms of order 5. - Vladimir Cepulic (Discret. Math., 1994)

The unique symmetric block design (61, 16, 4) admitting an automorphism of order 15 operating standardly. - Vladimir Cepulic (Discret. Math., 1997)

Construction of symmetric block designs using normal subgroups of automorphism groups. - Vladimir Cepulic (Electron. Notes Discret. Math., 2001)