@ARTICLE{
author={Popovic Zoran V,Ivanov VA,Konstantinovic Milan J,Cantarero A,Martinez-Pastor J,Olguin D,Alonso MI,Garriga M,Khuong OP,Vietkin A,Moshchalkov VV},
year={2001},
title={Optical studies of gap, hopping energies, and the Anderson-Hubbard parameter in the zigzag-chain compound SrCuO2},
journal={PHYSICAL REVIEW B},
volume={63},
number={16},
pages={art. no.-165105},
document_type={Article},
} 

@ARTICLE{
author={Popovic Zoran V,Konstantinovic Milan J,Gajic Rados B,Thomsen Christian,Kuhlmann U,Vietkin A},
year={2001},
title={Polarized far-infrared and Raman spectra of SrCuO2 single crystals},
journal={PHYSICA C},
volume={351},
number={4},
pages={386-394},
document_type={Article},
} 

@ARTICLE{
author={Popovic Zoran V,Konstantinovic Milan J,Ivanov VA,Khuong OP,Gajic Rados B,Vietkin A,Moshchalkov VV},
year={2000},
title={Optical properties of the spin-ladder compound Sr14Cu24O41},
journal={PHYSICAL REVIEW B},
volume={62},
number={8},
pages={4963-4972},
document_type={Article},
}