M. Grözing, and M. Berroth. Conference on Ph.D. Research in Microelectronics and Electronics (PRIME), page 485--488. Otranto (Lecce), Italy, IEEE, (2006)
J. Bozler, F. Lang, D. Ferenci, and M. Berroth. Kleinheubacher Tagung, U.R.S.I. Landesausschuss in der Bundesrepublik Deutschland e.V, Miltenberg, Germany, (2009)