TY - JOUR AU - O. V. Kaptsov TI - Algebraic and geometric structures of analytic partial differential equations JO - Teoretičeskaâ i matematičeskaâ fizika PY - 2016 SP - 219 EP - 238 VL - 189 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_2016_189_2_a4/ LA - ru ID - TMF_2016_189_2_a4 ER -