1. H. Roser, Schirme zur Erhöhung der Durchschlagsspannung in Luft, E.T.Z., Vol. B 17, pp. 411–412 (1932)
2. Li Ming, M. Leijon, T. Bengtsson, M. Darveniza, Barrier Effect in a Rod/Rod Air Gap under DC Voltage, 7th Inter Symp. on Gaseous Dielectrics, Knoxville, USA, April 24-28 (1994).
3. A. Beroual, A. Boubakeur, Influence of Barrier on Lightning and Switching Impulse Strength of Mean Air Gaps in Point/Plane Arrangements, IEEE Trans. on El. Ins. Vol. 26, pp 1130–1139 (1991).
4. U. Fromm, Li Ming, T. Schütte, L. Walfridsson, A. Kron, Rongsheng Liu, D. Windmar, Electric Field Control by Polymer Foam, ICSD, Västeras, Sweden (1998)
5. P.O. Geszti, J. Patk, Overhead Lines with Insulated Phase Conductors, Acta Technica Academiae Scientarum Hungaricae, Vol 73 (3-4), pp. 265–277 (1972)