Turtsevich, A. S., I. I. Rubtsevich, Solov’yovY. А., O. S. Vas’kov, V. K. Kononenko, V. S. Niss, and A. F. Kerentsev. “The Investigation of Quality of Power-Transistor Crystals Soldering by a Transient Impedance-Spectrometer”. Technology and Design in Electronic Equipment, no. 5, Oct. 2012, pp. 44-47, http://www.tkea.com.ua/index.php/journal/article/view/TKEA2012.5.44.