1. Muon observations;Duldig;Space Sci. Rev.,2000
2. F. Jansen, K. Munakata, M. Duldig, R. Hippler, Muon detectors–the real-time, ground based forecast of geomagnetic storms in Europe, in: ESA Space Weather Workshop: Looking Towards a European Space Weather Programme, 2001.
3. Development of a ground level enhancement alarm system based upon neutron monitors;Kuwabara;Space Weather,2006
4. Nagoya experiment,2019
5. GRAPES-3,2019