On bijections that preserve complementarity of subspaces. - Andrea Blunck; Hans Havlicek (Discret. Math., 2005)

Lifting of divisible designs. - Andrea Blunck; Hans Havlicek; Corrado Zanella (Des. Codes Cryptogr., 2007)

Divisible designs from twisted dual numbers. - Andrea Blunck; Hans Havlicek; Corrado Zanella (Des. Codes Cryptogr., 2008)