TY - JOUR AU - A. G. Podgaev TI - A problem with a free boundary for nonlinear equation with a change in the direction of evolution JO - Čelâbinskij fiziko-matematičeskij žurnal PY - 2024 SP - 407 EP - 425 VL - 9 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CHFMJ_2024_9_3_a4/ LA - ru ID - CHFMJ_2024_9_3_a4 ER -