@article{04030296,
title = {M-quasi-hyponormal composition operators.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {10},
year = {1987},
pages = {621-623},
doi = {10.1155/S0161171287000760},
zbl = {0633.47013},
language = {en},
url = {http://dml.mathdoc.fr/item/04030296}
}
Suri, Pushpa R.; Singh, N. M-quasi-hyponormal composition operators.. International Journal of Mathematics and Mathematical Sciences, Tome 10 (1987) pp. 621-623. doi : 10.1155/S0161171287000760. http://gdmltest.u-ga.fr/item/04030296/