@Article{anderson1994sec,
	author =	{Anderson, R. and Bilger, H.R. and Stedman, G.E.},
	title = 	"{ёSagnacҒeffect: A century of Earth-rotated interferometers}",
	journal =	{American Journal of Physics},
	volume =	{62},
	month =	{},
	year =	{1994},
}