@article{10_4064_sm145_1_6,
     author = {Ferenc Oravecz},
     title = {On the powers of {Voiculescu's} circular element},
     journal = {Studia Mathematica},
     pages = {85--95},
     publisher = {mathdoc},
     volume = {145},
     number = {1},
     year = {2001},
     doi = {10.4064/sm145-1-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm145-1-6/}
}