Mizerakova, J., P. Hockicko, and F. Munoz. “Dielectric Study of Lithium and Sodium Borophosphate Glasses”. Communications - Scientific Letters of the University of Zilina, Vol. 19, no. 3, Sept. 2017, pp. 46-50, http://journals.uniza.sk/index.php/communications/article/view/232.