Radiological protection requirements with regard to cosmic ray exposure during air travelCebastien Joel Guembou Shouop, Maurice Ndontchueng Moyo, Eric Jilbert Nguelem Mekongtso, Kunwoo Cho and David StrivayEur. Phys. J. Plus, 135 5 (2020) 438DOI: https://doi.org/10.1140/epjp/s13360-020-00468-8