@article{1255632320, author = {Dubins, Lester E.}, title = {Rises and upcrossings of nonnegative martingales}, journal = {Illinois J. Math.}, volume = {6}, number = {1}, year = {1962}, pages = { 226-241}, language = {en}, url = {http://dml.mathdoc.fr/item/1255632320} }
Dubins, Lester E. Rises and upcrossings of nonnegative martingales. Illinois J. Math., Tome 6 (1962) no. 1, pp. 226-241. http://gdmltest.u-ga.fr/item/1255632320/