@article{10_4064_sm195_1_1,
     author = {C. Benhida and E. H. Zerouali},
     title = {Backward {Aluthge} iterates of a hyponormal operator
 and scalar extensions},
     journal = {Studia Mathematica},
     pages = {1--10},
     publisher = {mathdoc},
     volume = {195},
     number = {1},
     year = {2009},
     doi = {10.4064/sm195-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm195-1-1/}
}