@Article{wells5,
	author =	{Schreiber, K.U. and Hautmann, J.N. and Velikoseltsev, A. and Wasserman, J. and Igel, H. and Otero, J. and Vernon, F. and Wells, J.-P. R.},
	title = 	"{Ring Laser Measurements of Ground Rotations for Seismology}",
	journal =	{Bulletin of the Seismological Society of America},
	volume =	{99},
	number =	{2B},
	month =	{May},
	year =	{2009},
}