@article{AFM_2013_38_2_a8,
     author = {Daniel Li and Herv\'e Queff\'elec and Luis Rodr{\'\i}guez-Piazza},
     title = {Estimates for approximation numbers of some classes of composition operators on the {Hardy} space},
     journal = {Annales Fennici Mathematici},
     pages = {547--564},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {2013},
     doi = {10.5186/aasfm.2013.3823},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2013.3823/}
}