Correlation analysis of solar energetic particles and secondary cosmic ray fluxNikola Veselinović, Mihailo Savić, Aleksandar Dragić, Dimitrije Maletić, Radomir Banjanac, Dejan Joković, David Knežević and Vladimir UdovičićEur. Phys. J. D, 75 6 (2021) 173DOI: https://doi.org/10.1140/epjd/s10053-021-00172-x