Muon flux variations detected by the URAGAN muon hodoscope during thunderstorms,
Barbashina, N. S., I. I. Astapov, T. A. Belyakova, et al. (2017),
B. Russ. Acad. Sci.: Phys., 81, 2 p. 230–233,
10.3103/S106287381702006X.