@Article{bilger1990geometric_polarisation,
	author =	{Bilger, H.R. and Stedman, G.E. and Wells, P.V.},
	title = 	"{Geometrical dependence of polarisation in near-planar ring lasers}",
	journal =	{Optics communications},
	volume =	{80},
	number =	{2},
	month =	{},
	year =	{1990},
}