@ARTICLE{
author={Grujic Mirjana U,Kostic Radmila S,Rakovic Dejan I},
year={2003},
title={Vibrational calculation of single-wall armchair carbon nanotubes of small diameter},
journal={CONTEMPORARY STUDIES IN ADVANCED MATERIALS AND PROCESSES},
volume={413},
number={},
pages={45-48},
document_type={Article},
} 

@ARTICLE{
author={Grujic Mirjana U,Kostic Radmila S,Rakovic Dejan I,Gribov LA},
year={2000},
title={Vibrational cluster calculations of zig-zag carbon single-wall nanotubes},
journal={TRENDS IN ADVANCED MATERIALS AND PROCESSES},
volume={352},
number={},
pages={123-127},
document_type={Article},
}