H.J. Hopman, The dispersion diagram of the plasma waves on the plasma branch in a beam-created plasma = Bir elektron huzmesi yardimiyle meydana getirilen plazmadaki dalgalarin dispersiyon diyagrami, Rev. Fac. Sci. Univers. Istanbul C 35, (1972)
H. van Dop, A.J.H. Boerboom and J.H. Los, Elastic scattering of K+ ions from diatomic molecules in the energy range from 150 to 4000 eV, Physica 61, 626-629 (1972)
J.F.M. Aarts and F.J. de Heer, Emission cross sections for NI and NII multiplets and some molecular bands for electron impact on N2, Physica 52, 45-73 (1971)
