TY - JOUR AU - L. N. Orlova TI - The geometry of a~quasilinear system of two partial differential equations containing the first and second partial derivatives of two functions in two independent variables JO - Fundamentalʹnaâ i prikladnaâ matematika PY - 2010 SP - 67 EP - 84 VL - 16 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FPM_2010_16_2_a7/ LA - ru ID - FPM_2010_16_2_a7 ER -