TY - JOUR AU - V. A. Vatutin AU - C. Dong AU - E. E. Dyakonova TI - Random walks conditioned to stay nonnegative and branching processes in an unfavourable environment JO - Sbornik. Mathematics PY - 2023 SP - 1501 EP - 1533 VL - 214 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_2023_214_11_a0/ LA - en ID - SM_2023_214_11_a0 ER -