@article{Ufnalski_B._Plug-in_2015,
 author={Ufnalski, B. and Grzesiak, L.M.},
 volume={63},
 number={No 4},
 howpublished={online},
 journal={Bulletin of the Polish Academy of Sciences: Technical Sciences},
 pages={857-866},
 year={2015},
 title={Plug-in direct particle swarm repetitive controller with a reduced dimensionality of a fitness landscape – a multi-swarm approach},
 doi={10.1515/bpasts-2015-0098},
}