Yerezhep, N., Trzaska, W., Bezrukov, L., Enqvist, T., Kuusiniemi, P., Inzhechik, L., Joutsenvaara, J., Loo, K., Lubsandorzhiev, B., Slupecki, M., Saduyev, N., Baktoraz, A., & Mukhamejanov, Y. (2020). 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 (Rec.Contr.Phys.), 72(1), 19-26. doi:10.26577/RCPh.2020.v72.i1.03