Bagdanavičius, N., P. Balaišis, D. Eidukas, E. Keras, and A. Valinevičius. 2006. “Features of Biotronics Systems”. Elektronika Ir Elektrotechnika 72 (8):55-60. https://eejournal.ktu.lt/index.php/elt/article/view/10789.