TY - JOUR AU - M. V. Dolgopolov AU - I. N. Rodionova TI - On formulation of modified problems for the Euler--Darboux equation with parameters equal to~$\dfrac{1}{2}$ in absolute value JO - Contemporary Mathematics. Fundamental Directions PY - 2019 SP - 11 EP - 20 VL - 65 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMFD_2019_65_1_a1/ LA - ru ID - CMFD_2019_65_1_a1 ER -