PT Unknown AU Gottowik, M Glaser, C Huege, T Rautenberg, J TI Modelling uncertainty of the radiation energy emitted by extensive air showers SE Proceedings of the 35th International Cosmic Ray Conference, ICRC 2017, Bexco, Busan, Korea, 12th - 20th July 2017 PY 2017 BP Art.Nr. EP 303 LA english ER