Numerical distance protection : principles and application / by Gerhard Ziegler. Ziegler, Gerhard, 1939- Siemens Aktiengesellschaft. Electric power systems Protection. Protective relays. TK2861 .Z54 2008 621.317 22 ZIN Includes bibliographical references (p. 352-360). Munich : Publicis Pub., 20011. 20011. 2008 Text 419 p. : http://www.loc.gov/catdir/enhancements/fy0902/2008279093-b.html http://www.loc.gov/catdir/enhancements/fy0902/2008279093-d.html http://www.loc.gov/catdir/enhancements/fy0902/2008279093-t.html eng