TY - JOUR AU - N. L. Grigorov TI - The share of protons in cosmic ray flux at the energies $\gtrsim25$ TeV JO - Doklady Akademii Nauk PY - 1989 SP - 850 EP - 853 VL - 308 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1989_308_4_a20/ LA - ru ID - DAN_1989_308_4_a20 ER -