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11. Monitoring electrocardiographic data in ambulatory patients. Kleiman JH, Winkle RA. Med Instrum; 1977 Feb; 11(5):293-5. PubMed ID: 916924 [Abstract] [Full Text] [Related]
12. Evaluation of the Reynolds Pathfinder II system for 24 h heart rate variability analysis. Mølgaard H. Eur Heart J; 1991 Nov; 12(11):1153-62. PubMed ID: 1782942 [Abstract] [Full Text] [Related]
14. High-impedance electrocardiogram amplifier-transmitter for use with dry electrodes. SAM-TR-68-55. Johnson JB, Allred JE. Tech Rep SAM-TR; 1968 Aug; ():1-6. PubMed ID: 5305506 [No Abstract] [Full Text] [Related]
15. A heart rate/ECG recording device for sports research or rehabilitation. Morris AF, Dotson C. Br J Sports Med; 1978 Sep; 12(3):134-6. PubMed ID: 719322 [No Abstract] [Full Text] [Related]
19. A system for measurement of cardiovascular parameters. Willard PW, Beck HR. Med Res Eng; 1969 Sep; 8(3):33-6 passim. PubMed ID: 5791266 [No Abstract] [Full Text] [Related]