Mohammed Khachan Patrick Chenin Hafsa Deddi Digital <i>n</i>-Pseudomanifold and <i>n</i>-Weakmanifold in a Binary (<i>n</i>+1)-Digital Image. 37-45 http://link.springer.de/link/service/series/0558/bibs/1953/19530037.htm 2000 conf/dgci/2000 DGCI db/conf/dgci/dgci2000.html#KhachanCD00