V. Litovski, Univ. of Niš (Serbia and Montenegro)
S. Milenković, Univ. of Niš (Serbia and Montenegro)
Ž. Mrčarica, Philips Semiconductors (Switzerland)
M. Andrejević, Univ. of Niš (Serbia and Montenegro)
Z. Petković, Univ. of Niš (Serbia and Montenegro)