Correlation between RR, inter-systolic and inter-diastolic intervals and their differences for the analysis of spontaneous heart rate variability - Dias, D. P. M.; Silva, L. E. V.; Katayama, Pedro Lourenço; Silva, C. A. A.; Salgado, Hélio César; Fazan Júnior, Rubens (Physiological Measurement, 2016)