@misc{Bartosiewicz_Z._On_2013,
 author={Bartosiewicz, Z.},
 volume={61},
 number={No 4},
 pages={905-910},
 howpublished={online},
 year={2013},
 title={On positive reachability of time-variant linear systems on time scales},
 doi={10.2478/bpasts-2013-0097},
}