%0 Journal Article %A Truss, J. K. %T The Failure of Cancellation Laws for Equidecomposability Types %J Canadian journal of mathematics %D 1990 %P 590-606 %V 42 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-031-5/ %R 10.4153/CJM-1990-031-5 %F 10_4153_CJM_1990_031_5