Yerezhep, N., W. Trzaska, L. Bezrukov, T. Enqvist, P. Kuusiniemi, L. Inzhechik, J. Joutsenvaara, K. Loo, B. Lubsandorzhiev, M. Slupecki, N. Saduyev, A. Baktoraz, and Y. Mukhamejanov. “Underground Investigation of Extensive Air Showers Spectra at High Energy Range of Cosmic Rays and Other Research in the Pyhäsalmi Mine”. Recent Contributions to Physics, vol. 2020, no. 1, Mar. 2020, pp. 19-26, doi:10.26577/RCPh.2020.v72.i1.03.