Quasigroups, isotopisms and authentication schemes. - Ed Dawson; Diane M. Donovan; Alan Offer (Australas. J Comb., 1996)

On the Order of a Generalized Hexagon Admitting an Ovoid or Spread. - Alan Offer (J. Comb. Theory A, 2002)

Spreads and Ovoids Translation with Respect to Disjoint Flags. - Alan Offer; Hendrik Van Maldeghem (Des. Codes Cryptogr., 2004)

Distance-j ovoids and related structures in generalized polygons. - Alan Offer; Hendrik Van Maldeghem (Discret. Math., 2005)

On the nonexistence of certain Hughes generalized quadrangles. - Joris De Kaey; Alan Offer; Hendrik Van Maldeghem (Des. Codes Cryptogr., 2007)