Goldberger A, Amaral L, Glass L, Hausdorff J et al. (2000).
A qrs detection and r point recognition method for wearable single-lead ecg devices.
Circulation, 101 (23), E215-20. https://www.mdpi.com/1424-8220/17/9/1969
Laguna P, Mark RG, Goldberg A, Moody GB (1997).
A database for evaluation of algorithms for measurement of qt and other waveform intervals
in the ecg.
Computers in cardiology 1997, 673-676. https://ieeexplore.ieee.org/document/648140