@ARTICLE{Bębel_B._Formal_2014,
 author={Bębel, B. and Morzy, T. and Królikowski, Z. and Wrembel, R.},
 volume={62},
 number={No 2},
 journal={Bulletin of the Polish Academy of Sciences Technical Sciences},
 pages={331-340},
 howpublished={online},
 year={2014},
 title={Formal model of time point-based sequential data for OLAP-like analysis},
 URL={http://journals.pan.pl/Content/83919/PDF/13_paper.pdf},
 doi={10.2478/bpasts-2014-0032},
}