Poderys, J., A. Buliuolis, A. Grunovas, A. Vainoras, and R. Ruseckas. 2009. “Analysis of Accelerometer Signals for Monitoring of Physical Activity – Methods and Application Results”. Elektronika Ir Elektrotechnika 94 (6):85-88. https://eejournal.ktu.lt/index.php/elt/article/view/10113.