@article{GDZPPN00117925X, title = {Numerical Computation of Nonsimple Turning Points and Cusps.}, journal = {Numerische Mathematik}, volume = {46}, year = {1985}, pages = {189-212}, zbl = {0543.65040}, url = {http://dml.mathdoc.fr/item/GDZPPN00117925X} }
Roose, Dirk; Piessens, Robert. Numerical Computation of Nonsimple Turning Points and Cusps.. Numerische Mathematik, Tome 46 (1985) pp. 189-212. http://gdmltest.u-ga.fr/item/GDZPPN00117925X/