Ian P. Howard

Interactions within and between the spatial senses.

I P Howard, I. Howard, Ian P. Howard, 1997, Journal of vestibular research : equilibrium & orientation.

Effects of stimulus size and eccentricity on horizontal and vertical vergence

I. P. Howard, R. S. Allison, I. Howard, 2000, Experimental Brain Research.

The relative role of visual and non-visual cues in determining the perceived direction of "up": experiments in parabolic flight.

J E Zacher, M R Jenkin, L R Harris, 2005, Acta astronautica.