Linear codes and doubly transitive symmetric designs, Christopher Parker, Vladimir Tonchev
Department of Mathematical Sciences Publications

Designs with the symmetric difference property on 64 points and their groups, Christopher Parker, Edward Spence, Vladimir Tonchev
Department of Mathematical Sciences Publications

A design and a code invariant under the simple group Co3, Willem Haemers, Christopher Parker, Vera Pless, Vladimir Tonchev
Department of Mathematical Sciences Publications