@article{SPS_1981__15__191_0,
     author = {Maisonneuve, Bernard},
     title = {On {L\'evy's} downcrossing theorem and various extensions},
     journal = {S\'eminaire de probabilit\'es},
     pages = {191--205},
     year = {1981},
     publisher = {Springer - Lecture Notes in Mathematics},
     volume = {15},
     mrnumber = {622563},
     zbl = {0466.60071},
     language = {en},
     url = {https://www.numdam.org/item/SPS_1981__15__191_0/}
}