@incollection{AST_2003__286__223_0,
     author = {Broer, Henk},
     title = {Coupled {Hopf-bifurcations:} {Persistent} examples of $n$-quasiperiodicity determined by families of 3-jets},
     booktitle = {Geometric methods in dynamics (I) : Volume in honor of Jacob Palis},
     editor = {de Melo, Wellington and Viana, Marcelo and Yoccoz, Jean-Christophe},
     series = {Ast\'erisque},
     pages = {223--229},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {286},
     year = {2003},
     mrnumber = {2052303},
     zbl = {1039.37030},
     language = {en},
     url = {http://www.numdam.org/item/AST_2003__286__223_0/}
}