A Generalization of Magic Squares with Applications to Digital Halftoning.

Boris Aronov Tetsuo Asano Yosuke Kikuchi Subhas C. Nandy Shinji Sasahara Takeaki Uno A Generalization of Magic Squares with Applications to Digital Halftoning. 89-100 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3341&spage=89 2004 conf/isaac/2004 ISAAC db/conf/isaac/isaac2004.html#AronovAKNSU04