Could particles with energies above 4 x 1017 eV be neutral?
Glushkov A. V.
The individual arrival directions of extensive air showers with energies above 4 Χ1017 eV in data from the Yakutsk installation are analyzed in equatorial coordinates. There is a significant number of groups of showers in narrow solid angles which form chains and which partly coincide with extragalactic radio sources.