TY - JOUR AU - Yu. K. Sirenko AU - V. P. Shestopalov TI - Isolation of the physical solutions of problems in the theory of JO - Doklady Akademii Nauk PY - 1987 SP - 1346 EP - 1350 VL - 297 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1987_297_6_a14/ LA - ru ID - DAN_1987_297_6_a14 ER -