1. The effect of random frequency modulation on ECG power spectra;Richardson, J.M.; Murthy, V.K.; Haywood, L.J.;IEEE Trans Biomed Eng,1979
2. A simple test for phase characteristics of chart recorders;Wagner, J.W.;IEEE Trans Bimrned Eng,1979
3. Signal distortion in the electrocardiogram due to inadequate phase response;Tayler, D.I.; Vincent, R.;IEEE Trans Biomed Eng,1983
4. Advertising material for Tracker tape recorder;Medical, Reynolds;Eur Heart J; 3: inside back cover,1982
5. Filtering without phase shift;Longini, R.L.; Giolma, J.P.; Wall, C.; Quick, R.F.;IEEE Trans Bioned Eng,1975