Experimental investigation of electron impact excitation of zinc atoms to the 41P1 stateM. Piwiński, D. Dziczek, Ł. Kłosowski and S. ChwirotEur. Phys. J. Special Topics, 222 9 (2013) 2273-2277DOI: https://doi.org/10.1140/epjst/e2013-02005-0