@article{IM2_2023_87_1_a2,
     author = {V. I. Lotov},
     title = {Exact formulas in~some boundary crossing problems},
     journal = {Izvestiya. Mathematics},
     pages = {45--60},
     year = {2023},
     volume = {87},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2023_87_1_a2/}
}