@article{10_1017_S0017089507003497,
     author = {MARY, J. STELLA IRENE and PANAYAPPAN, S.},
     title = {SOME {PROPERTIES} {OF} {CLASS} {A(k)} {OPERATORS} {AND} {THEIR} {HYPONORMAL} {TRANSFORMS}},
     journal = {Glasgow mathematical journal},
     pages = {133--143},
     year = {2007},
     volume = {49},
     number = {1},
     doi = {10.1017/S0017089507003497},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089507003497/}
}