Compressing Databases Down to Micro Size. - Hans Zellner (J. Int. Comput. Games Assoc., 1986)

KBBK Squeezed into a Micro. - Hans Zellner (J. Int. Comput. Games Assoc., 1987)

Corrections and Substantiations to KBNK. - Hans Zellner; H. Jaap van den Herik; I. S. Herschberg (J. Int. Comput. Games Assoc., 1987)

The KPK Database Revisited. - Hans Zellner (J. Int. Comput. Games Assoc., 1989)

KBBKN on a Micro. - Hans Zellner (J. Int. Comput. Games Assoc., 1989)