@article{10_4153_CJM_1977_083_0,
     author = {McDonald, David R.},
     title = {On {Upcrossing} {Probabilities}},
     journal = {Canadian journal of mathematics},
     pages = {806--818},
     year = {1977},
     volume = {29},
     number = {4},
     doi = {10.4153/CJM-1977-083-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-083-0/}
}