@article{10_4153_CJM_2001_015_6,
     author = {Nica, Alexandru and Shlyakhtenko, Dimitri and Speicher, Roland},
     title = {R-Diagonal {Elements} and {Freeness} {With} {Amalgamation}},
     journal = {Canadian journal of mathematics},
     pages = {355--381},
     year = {2001},
     volume = {53},
     number = {2},
     doi = {10.4153/CJM-2001-015-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2001-015-6/}
}