Tubes in PG(3, q). - Peter J. Cameron; Norbert Knarr (Eur. J. Comb., 2006)

Quasifields of symplectic translation planes. - Norbert Knarr (J. Comb. Theory A, 2009)

Polarities and unitals in the Coulter-Matthews planes. - Norbert Knarr; Markus J. Stroppel (Des. Codes Cryptogr., 2010)