L. Silva

Correlation between RR, inter-systolic and inter-diastolic intervals and their differences for the analysis of spontaneous heart rate variability

P. L. Katayama, H. Salgado, R. Fazan, 2016, Physiological measurement.

Evaluation of physiologic complexity in time series using generalized sample entropy and surrogate data analysis

Luiz Otavio Murta, L. Murta, Luis Eduardo Virgilio Silva, 2012 .