@article{10_5427_jsing_2014_10q,
     author = {G. Pe\~nafort-Sanchis},
     title = {The {Geometry} of {Double} {Fold} {Maps}},
     journal = {Journal of Singularities},
     pages = {250--263},
     publisher = {mathdoc},
     volume = {10},
     year = {2014},
     doi = {10.5427/jsing.2014.10q},
     url = {http://geodesic.mathdoc.fr/articles/10.5427/jsing.2014.10q/}
}