@article{NUMA_1985__46_132991,
     author = {Dirk Roose and Robert Piessens},
     title = {Numerical {Computation} of {Nonsimple} {Turning} {Points} and {Cusps.}},
     journal = {Numerische Mathematik},
     pages = {189--212},
     publisher = {mathdoc},
     volume = {46},
     year = {1985},
     zbl = {0543.65040},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1985__46_132991/}
}