%0 Journal Article %A Nica, Alexandru %A Shlyakhtenko, Dimitri %A Speicher, Roland %T R-Diagonal Elements and Freeness With Amalgamation %J Canadian journal of mathematics %D 2001 %P 355-381 %V 53 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2001-015-6/ %R 10.4153/CJM-2001-015-6 %F 10_4153_CJM_2001_015_6