Freddy Fierens Johan Van Cleynenbreugel Paul Suetens André Oosterlinck A software environment for image database research. 49-68 1992 3 J. Vis. Lang. Comput. 1 http://dx.doi.org/10.1016/1045-926X(92)90033-I db/journals/vlc/vlc3.html#FierensCSO92