@article{IM_1975__30_142346,
     author = {A. Douady and J. Hubbard},
     title = {On the {Density} of {Strebel} {Differentials.}},
     journal = {Inventiones mathematicae},
     pages = {175--180},
     publisher = {mathdoc},
     volume = {30},
     year = {1975},
     zbl = {0371.30017},
     url = {http://geodesic.mathdoc.fr/item/IM_1975__30_142346/}
}