Alio, L., Diep, P. N., Dong, P. N., Hoai, D. T., Nhung, P. T. T., Darriulat, P. and Thao, N. T. (2012) “Extensive Air Showers and the LPM Effect”, Communications in Physics, 20(2), p. 181. doi: 10.15625/0868-3166/20/2/2182.