1. Influence of respiration on recording cardiac potentials;Flaherty;Am J Cardiol,1967
2. Body position, electrode level and respiration effects on the Frank lead electrocardiogram;Riekkinen;Circ,1976
3. Recovering the respiratory rhythm out of the ECG;Pallas-Areny;Med Biol Eng Comput,1985
4. Detection of electrical axis variation for the extraction of respiratory information;Pinciroli,1985
5. Derivation of respiratory signals from multi-lead ECGs;Moody,1985