Koniar, D., L. Hargaš, S. Štofan, and M. Hrianka. 2010. “High Speed Video System for Tissue Measurement Based on PWM Regulated Dimming and Virtual Instrumentation”. Elektronika Ir Elektrotechnika 106 (10):169-72. https://eejournal.ktu.lt/index.php/elt/article/view/9154.