Turtsevich, A. S.; Rubtsevich, I. I.; Solov’yovY. А.; Vas’kov, O. S.; Kononenko, V. K.; Niss, V. S.; Kerentsev, A. F. The Investigation of Quality of Power-Transistor Crystals Soldering by a Transient Impedance-Spectrometer. TKEA 2012, 44-47.