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. 143-156 2008 42 Theory Comput. Syst. 2 http://dx.doi.org/10.1007/s00224-007-9005-x db/journals/mst/mst42.html#AronovAKNSU08