Linturi, J., Okumu, J. and Singh, C.S. 2016. A Distorted Wave Method Applied to Study the 23 P Excitation of Helium Atom by Electron Impact. Indonesian Journal of Physics. 22, 2 (Nov. 2016), 35-40. DOI:https://doi.org/10.5614/itb.ijp.2011.22.2.1.