@ARTICLE{
author={Nikolic Pantelija M,Paraskevopoulos KM,Vujatovic Stevan S,Nikolic Maria Vesna P,Chatzistavrou X,Pavlidou Eleni,Ivetic Tamara B,Blagojevic Vladimir D,Bojicic Aleksandar I,Dinulovic D},
year={2009},
title={Optical properties of PbTe and PbSnTe doped with Cr},
journal={JOURNAL OF ALLOYS AND COMPOUNDS},
volume={480},
number={2},
pages={893-896},
document_type={Article},
} 

@ARTICLE{
author={Nikolic Pantelija M,Paraskevopoulos KM,Nikolic Maria Vesna P,Vujatovic Stevan S,Zorba TT,Chatzistavrou X,Stamenovic Bojana,Lukovic-Golic Danijela T,Blagojevic Vladimir D,Bojicic Aleksandar I},
year={2009},
title={Far infrared study of impurity local modes in Pr doped PbTe},
journal={MATERIALS CHEMISTRY AND PHYSICS},
volume={114},
number={1},
pages={185-187},
document_type={Article},
}