@ARTICLE{Hippe_Peter_Regular_2012,
 author={Hippe, Peter},
 number={No 2},
 journal={Archives of Control Sciences},
 howpublished={online},
 year={2012},
 publisher={Committee of Automatic Control and Robotics PAS},
 title={Regular design equations for the discrete reduced-order Kalman filter},
 URL={http://www.czasopisma.pan.pl/Content/84234/PDF/4.pdf},
 doi={10.2478/v10170-011-0019-x},
}