@article{10_1090_S0894_0347_01_00371_X,
     author = {Marmi, Stefano and Moussa, Pierre and Yoccoz, Jean-Christophe},
     title = {Complex {Brjuno} functions},
     journal = {Journal of the American Mathematical Society},
     pages = {783--841},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {2001},
     doi = {10.1090/S0894-0347-01-00371-X},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-01-00371-X/}
}