@article {Murphy1997,
	title = {Confirmation of the utility of the hircal grid for assessment of tear film stability},
	journal = {Investigative Ophthalmology and Visual Science},
	volume = {38},
	year = {1997},
	author = {Blades, K.J. and Craig, J.P. and Farrell, J. and Murphy, P.J. and Doughty, M.J.}
}
