TY - JOUR AU - È. P. Gulin TI - On the coherence of an acoustic field in the reflection of sound from JO - Doklady Akademii Nauk PY - 1973 SP - 1082 EP - 1085 VL - 212 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1973_212_5_a14/ LA - ru ID - DAN_1973_212_5_a14 ER -