1. Institute of Microelectronics and Photonics, Aleja Lotników 32/46,Łukasiewicz Research Network,Department of Glass,Warsaw,Poland,02-668
2. Photonics Institute, Vienna University of Technology Gusshausstrasse 25-29,Vienna,Austria,1040
3. International Laser Centre, Ilkovičova 3,Slovak Centre of Scientific and Technical Information,Bratislava,Slovakia,84104