@article{TM_1981_158_a11,
     author = {A. A. Novikov},
     title = {The martingale approach in problems on the time of the first crossing of nonlinear boundaries},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {130--152},
     publisher = {mathdoc},
     volume = {158},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1981_158_a11/}
}