Evidence for Radio Detection of Extensive Air Showers Induced by Ultra   High Energy Cosmic Rays
  Firm evidence for a radio emission counterpart of cosmic ray air showers is presented. By the use of an antenna array set up in coincidence with ground particle detectors, we find a collection of events for which both time and arrival direction coincidences between particle and radio signals are observed. The counting rate corresponds to shower energies $\gtrsim 5\times 10^{16}$ eV. These results open overwhelming perspectives to complete existing detection methods for the observation of ultra high-energy cosmic rays. 
D. Ardouin, A. Bell\'etoile, D. Charrier, R. Dallier, T. Gousset, F.   Haddad, J. Lamblin, P. Lautridou, O. Ravel, A. Lecach...