Bowden, C., Bradbury, S., Chadwick, P., Dickinson, J., Dipper, N., Edwards, P., …Turver, K. (1992). The effect of the geomagnetic field on TeV gamma -ray detection. Journal of Physics G: Nuclear and Particle Physics, 18, L55-L60. https://doi.org/10.1088/0954-3899/18/2/007