@ARTICLE{Ngoc_P.H.A._Robust_2015,
 author={Ngoc, P.H.A. and Tinh, C.T.},
 volume={63},
 number={No 4},
 journal={Bulletin of the Polish Academy of Sciences Technical Sciences},
 pages={947-954},
 howpublished={online},
 year={2015},
 title={Robust stability of positive linear time delay systems under time-varying perturbations},
 URL={http://ochroma.man.poznan.pl/Content/84379/PDF/14_paper.pdf},
 doi={10.1515/bpasts-2015-0107},
}