@article{10_1007_s10587_012_0073_y,
     author = {Fatehi, Mahsa and Robati, Bahram Khani},
     title = {Essential normality for certain finite linear combinations of linear-fractional composition operators on the {Hardy} space $H^{2}$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {901--917},
     publisher = {mathdoc},
     volume = {62},
     number = {4},
     year = {2012},
     doi = {10.1007/s10587-012-0073-y},
     mrnumber = {3010247},
     zbl = {1262.47052},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.1007/s10587-012-0073-y/}
}