@article {239,
	title = {Properties of nitrogen-vacancy centers in diamond:the group theoretic approach},
	journal = {New Journal of Physics},
	volume = {13},
	year = {2011},
	pages = {025025},
	author = {J R Maze and A Gali and E Togan and Y Chu and A Trifonov and E. Kaxiras and M D Lukin}
}
