D. Heerema

The synkinetic interaction of convergence accommodation and accommodative convergence

John Semmlow, J. Semmlow, Diane Heerema, 1979, Vision Research.

The role of accommodative convergence at the limits of fusional vergence.

J L Semmlow, J. Semmlow, D Heerema, 1979, Investigative ophthalmology & visual science.