@incollection{AST_1994__222__303_0,
     author = {El Morsalani, M. and Mourtada, A. and Roussarie, R.},
     title = {Quasi-regularity property for unfoldings of hyperbolic polycycles},
     booktitle = {Complex analytic methods in dynamical systems - IMPA, January 1992},
     editor = {Camacho C. and Lins Neto A. and Moussu R. and Sad P.},
     series = {Ast\'erisque},
     pages = {303--326},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {222},
     year = {1994},
     language = {en},
     url = {http://www.numdam.org/item/AST_1994__222__303_0/}
}