共 5 条
[1]
TRANSPARENCY OF EXTRAGALACTIC SPACE TO VERY-HIGH-ENERGY PHOTONS
[J].
LETTERE AL NUOVO CIMENTO,
1971, 1 (16)
:677-+
[3]
HILLAS AM, 1967, 10 P INT C COSM RAYS
[4]
POSSIBILITY OF DETECTABLE FLUXES OF COSMIC RAY GAMMA-RAYS WITH ENERGY ABOVE 1019EV
[J].
JOURNAL OF PHYSICS PART A GENERAL,
1971, 4 (02)
:L37-+
[5]
ZATSEPIN GT, 1966, JETP LETT, V4, P114