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Tárkányi, F., Szelecsényi, F., & Kopecky, P. (1991). Excitation functions of proton induced nuclear reactions on natural nickel for monitoring beam energy and intensity. International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 42(6), 513–517. doi:10.1016/0883-2889(91)90154-s 
10.1016/0883-2889(91)90154-s