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\bibitem{Nistor_etal1999} {\textquotedblleft}\textit{High resolution electron microscopy and electron spin resonance studies on cubic boron nitride crystals made by high-pressure/high-temperature synthesis}{\textquotedblright}. Nistor L, Nistor SV, Dinc{\~a} G, van Landuyt J, Schoemaker D, Copaciu V, Georgeoni P, Arnici N, Diamonds an related materials \textbf{8}, 738 (1999).   http://doi.org/10.1016/S0925-9635(98)00282-9

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