@article{KYB_2010__46_3_a11,
     author = {B\"utikofer, Stephan and Klatte, Diethard and Kummer, Bernd},
     title = {On second{\textendash}order {Taylor} expansion of critical values},
     journal = {Kybernetika},
     pages = {472--487},
     publisher = {mathdoc},
     volume = {46},
     number = {3},
     year = {2010},
     mrnumber = {2676084},
     zbl = {1197.65062},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_2010__46_3_a11/}
}