Wilfried Gappmair Stefano Cioni Giovanni Emanuele Corazza Otto Koudelka Symbol-Timing Recovery with Modified Gardner Detectors. 831-834 2005 ISWCS https://doi.org/10.1109/ISWCS.2005.1547826 conf/iswcs/2005 db/conf/iswcs/iswcs2005.html#GappmairCCK05