1. Campbell, M-, Adams, P., Small, A. M., Tesch, L. M., & Currens, E. L. (1988). Naltrexone in infantile autism.Psychopharmacology Bulletin, 24, 135–139.
2. Campbell, M., Anderson, L. T., Small, A. M., Locasio, J., Lynch, N. S., & Choroco, M. C. (1990). Naltrexone in autistic children: a double-blind and placebo controlled study.Psychopharmacology Bulletin, 26.
3. Campbell, M. C., Overall, J. E., Small, A. M., Sokol, M. S., Spencer, E. K., Adams, P., Foltz, R. L., Monti, K. M., Perry, R., Nobler, M., & Roberts, E. (1989). Naltrexone in autistic children: An acute open dose range tolerance trial.Journal of Clinical Psychophnrmacology, 9, 448–449.
4. Davidson, S., Til-Ad, I., Rogovin, H., Laron, Z., & Reisner, S. H. (1987). Cardiorespiratory depression and plasma b-endorphin levels in low-birth-weight infants during the first day of life.American Journal of Diseases of Children, 141, 145–148.
5. Gilberg, C., Terenius, L., & Lonnerholm, G. (1985). Endorphin activity in childhood psychosis.Archives of General Psychiatry, 42, 780.