%0 conference lecture %@ %A Croci, G., Claps, G., Caniello, R., Cazzaniga, C., Grosso, G., Murtas, F., Tardocchi, M., Vassallo, E., gorini, G., Horstmann, C., Kampmann, R., Nowak, G., Stoermer, M. %D 2013 %J 13th Vienna Conference on Instrumentation, VCI 2013 %T GEM-based thermal neutron beam monitors for spallation sources %U %X