@article{10_5427_jsing_2015_11h,
     author = {Jean Vall\`es},
     title = {Free divisors in a pencil of curves},
     journal = {Journal of Singularities},
     pages = {190--197},
     publisher = {mathdoc},
     volume = {11},
     year = {2015},
     doi = {10.5427/jsing.2015.11h},
     url = {http://geodesic.mathdoc.fr/articles/10.5427/jsing.2015.11h/}
}