An explicit no response instead of time-out in automated visual-field testing
by Ulrich, Schiefer
Lutz S, Dietrich TJ, Benda N, Selig B, Strasburger H, Schiefer U (2001) An explicit no response instead of time-out in automated visual-field testing. Graefes Arch Clin Exp Ophthalmol 239:173-181