Electronic states in vertically ordered Ge/Si quantum dots detected by photocurrent spectroscopy / A. I. Yakimov, V. V. Kirienko, V. A. Armbrister [et.al.] // Physical Review B. 2014. Vol. 90, № 3. P. 035430-1-035430-6. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000490495