Voir la notice de l'article provenant de la source Numdam
@article{PS_1997__1__357_0, author = {Picard, Jean}, title = {Density in small time for {Levy} processes}, journal = {ESAIM: Probability and Statistics}, pages = {357--389}, publisher = {EDP-Sciences}, volume = {1}, year = {1997}, mrnumber = {1486930}, zbl = {0899.60065}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PS_1997__1__357_0/} }
Picard, Jean. Density in small time for Levy processes. ESAIM: Probability and Statistics, Tome 1 (1997), pp. 357-389. http://geodesic.mathdoc.fr/item/PS_1997__1__357_0/