O. O. Efremov V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine / N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine Ukraine
O. B. Loginova N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine Ukraine
S. P. Starik N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine Ukraine
G. D. Ilnytska N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine Ukraine