- Milton, J.G., Ohira, T., Steck, J., Crate, J., Longtin, A. (1993) Oscillations and latency in the clamped pupil light reflex. Proc. SPIE 2036: 198-203 (International Society for Optical Engineering).
- Longtin, A. (1991) Oscillation onset in neural delayed feedback, Proceedings, Third Neural Information Processing Systems (NIPS) conference, R.E. Lippman, D.S. Touretzky and J. Moody, eds., Denver, Nov. 1990 (Morgan Kaufmann, San Mateo, Ca) p.130-136. (pdf)
- Longtin, A., Milton, J.G., Bos, J. and Mackey, M.C. (1990) Noise and critical behavior of the pupil light reflex at oscillation onset, Phys. Rev. A 41, 6992-7005. (pdf)
- Milton, J.G., an der Heiden, U., Longtin, A. and Mackey, M.C. (1990) Complex dynamics and noise in simple neural networks with delayed mixed feedback, Biomed. Biochim. Acta 49 8/9: 697-707.
- Milton, J.G. and Longtin, A. (1990) Evaluation of pupil constriction and dilation from cycling measurements, Vision Res. 30: 515-525. (pdf)
- Longtin, A. and Milton, J.G. (1990) Time delays, noise and oscillations in neural feedback systems, in Proc., 12th Ann. Intern. Conf. IEEE Engineer. in Medicine and Biology Society, Philadelphia, Nov. 1990.
- Milton, J.G., Longtin, A., Beuter, A., Mackey, M.C. and Glass, L. (1989) Complex dynamics and bifurcations in neurology, J. Theor. Biol. 138, 129-147. (pdf)
- Longtin, A. and Milton, J.G. (1989) Modelling autonomous oscillations in the human pupil light reflex using nonlinear delay-differential equations, Bull. Math. Biol. 51: 605-624. (pdf) (used as textbook example in Mathematical Physiology by J. Keener and J. Sneyd)
- Longtin, A. and Milton, J.G. (1989) Insight into the transfer function, gain, and oscillation onset for the pupil light reflex using nonlinear delay-differential equations, Biol. Cybern. 61: 51-59. (pdf)
- Longtin, A. and Milton, J.G. (1988) Complex oscillations in the human pupil light reflex with mixed delayed feedback, Math. Biosci. 90: 183-199. (pdf)
- Milton, J.G., Longtin, A., Kirkham, T. and Francis, G.S. (1988) Reply to: "Is irregular pupil cycling caused by prolonged latency?" by K. Ukai, Am. J. Ophthalmol. 106, 371.
- Milton, J.G., Longtin, A., Kirkham, T. and Francis, G.S. (1988) Irregular pupil cycling: characteristic abnormality in patients with demyelinative optic neuropathy, Am. J. Ophthalmol. 105: 402-407.