@ARTICLE{Obara_P._Dynamic_2016,
 author={Obara, P. and Gilewski, W.},
 volume={64},
 number={No 4 (Special Section on Civil Engineering – Ongoing Technical Research. Part I)},
 journal={Bulletin of the Polish Academy of Sciences Technical Sciences},
 pages={739-750},
 howpublished={online},
 year={2016},
 title={Dynamic stability of moderately thick beams and frames with the use of harmonic balance and perturbation methods},
 URL={http://www.czasopisma.pan.pl/Content/105739/PDF/10.1515bpasts-2016-0083.pdf},
 doi={10.1515/bpasts-2016-0083},
}