1. Univ. of Cassino and S.L.,Dept. of Electrical and Information Engineering,Cassino,Italy
2. Institute of Photonics, Univ. of Eastern Finland,Joensuu,Finland
3. Univ. of Rome “Tor Vergata”,Dept. of Chemical Science and Techn.,Rome,Italy
4. Inst. for Nuclear Problems Belarusian State University,Minsk,Belarus