BibTeX

@ARTICLE{iumj4303,
    author = "R. Curto and Jasang Yoon",
     title = "When is hyponormality for 2-variable weighted shifts invariant under powers?",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 60,
      year = 2011,
     issue = 3,
     pages = "997--1032",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "47B20; 47B37; 47A13; 28A50;",
}

amsrefs

\bib{iumj4303}{article}{
     author = {Curto, R.},
     author = {Yoon, Jasang},
      title = {When is hyponormality for 2-variable weighted shifts invariant under powers?},
    journal = {Indiana Univ. Math. J.},
     volume = {60},
       year = {2011},
     number = {3},
      pages = {997 \ndash 1032},
}