TY - JOUR AU - V. N. Kessenikh TI - On possible methods of measuring the concentration of slow neutrons in the $F_2$ layer of the ionosphere JO - Doklady Akademii Nauk PY - 1958 SP - 57 EP - 59 VL - 123 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1958_123_1_a13/ LA - ru ID - DAN_1958_123_1_a13 ER -