Jankauskas Z, Kvedaras V, Zaveckas V. Determination of the characteristic frequency of two–level system in the modulated optical field. ELEKTRON ELEKTROTECH [Internet]. 2006Mar.19 [cited 2024Apr.24];67(3):61-4. Available from: https://eejournal.ktu.lt/index.php/elt/article/view/10634