Emilio Bertolotti Enrico Castaldo Gino Giannone Near Optimal Objects Packing through Dimensional Unfolding. 1433-1442 1996 conf/aaai/1996-2 AAAI/IAAI, Vol. 2 db/conf/aaai/aaai96-2.html#BertolottiCG96 http://www.aaai.org/Library/IAAI/1996/iaai96-271.php