Electron (positron) impact excitation (2p state) of lithium at intermediate energies M.Z.M. Kamali, J.H. Chin, S.Y. Ng and Kuru Ratnavelu Eur. Phys. J. D, 68 3 (2014) 50 Published online: 18 March 2014 DOI: 10.1140/epjd/e2014-40716-4