E R Howell

Spatial frequency and the detection of temporal discontinuity in superimposed and adjacent gratings

G. Stanley, Glen A. Smith, G Smith, 1982, Perception & psychophysics.

Near visual function in young children. Part I: Near point of convergence. Part II: Amplitude of accommodation. Part III: Near heterophoria.

A. H. Chen, D. O'leary, D J O'Leary, 2000, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

Monocular alternation: a method for the investigation of pattern vision.

F W Campbell, F. Campbell, E R Howell, 1972, The Journal of physiology.