@article{10_1017_S0017089500008338,
     author = {Campbell, James T. and Embry-Wardrop, Mary and Fleming, Richard J. and Narayan, S. K.},
     title = {Normal and quasinormal weighted composition operators},
     journal = {Glasgow mathematical journal},
     pages = {275--279},
     year = {1991},
     volume = {33},
     number = {3},
     doi = {10.1017/S0017089500008338},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008338/}
}