B. Rhett Rigby, Ronald W. Davis, Melissa D. Bittner, Robin W. Harwell, Eileen J. Leek, Geoben A. Johnson and David L. Nichols, Changes in Motor Skill Proficiency After Equine-Assisted Activities and Brain-Building Tasks in Youth With Neurodevelopmental Disorders, Front. Vet. Sci., 31 January 2020
Ohtani N, Kitagawa K, Mikami K, Kitawaki K, Akiyama J, Fuchikami M, Uchiyama H and Ohta M (2017) Horseback Riding Improves the Ability to Cause the Appropriate Action (Go Reaction) and the Appropriate Self-control (No-Go Reaction) in Children. Front. Public Health 5:8. doi: 10.3389/fpubh.2017.00008
Drew C. Coman; Margaret P. Bass; Michael Alessandri; Christine S. Ghilain and Maria M. Llabre,
Effect of Equine-Assisted Activities on Social and Sensory Functioning of Children with Autism, Society and Animals, Dec 17, 10.1163/15685306-12341479
Holly Dabelko-Schoeny, Gary Phillips, Emily Darrough, Sarah DeAnna, Marie Jarden, Denise Johnson & Gwendolen Lorch  Equine-Assisted Intervention for People with DementiaAnthrozoös Vol. 27 , Iss. 1,2014

Harris, Androulla and  Williams, Joanne M.,  The Impact of a Horse Riding Intervention on the Social Functioning of Children with Autism Spectrum Disorder,  Int. J. Environ. Res. Public Health 2017, 14(7), 776; doi: 10.3390/ijerph14070776

Gabriels, R.L., Pan, Z., Dechant, B., Agnew, J.A., Brim, N. & Mesibov, G. (2015) Randomized controlled trial of therapeutic horseback riding in children and adolescents with Autism Spectrum Disorder, The Journal of the American Academy of Child & Adolescent Pyschiatry, vol. 54, no. 7, 541-49.

Beth A. Lanning, PhD, MCHES; Nancy Krenek, PT, HPCS,

Effects of therapeutic horseback riding on post-traumatic stress disorder in military veterans, Rebecca A. Johnson, David L. Albright, James R. Marzolf, et al. Military Medical Research 20185:3

Effect of Hippotherapy on Motor Control, Adaptive Behaviors, and Participation in Children With Autism Spectrum Disorder: A Pilot StudyHeather F. Ajzenman; John W. Standeven; Tim L. Shurtleff, American Journal of Occupational Therapy, November 2013, Vol.67, 653-663.
Dabelko – Schoeny, H., Phillips, G., Darrough, E., DeAnna, S., Jardin, M., Johnson, D., & Lorch, G. (2014). Equine animal -assisted intervention for persons with dementia: Not just “horsing around”. Anthrozoos, Vol. 27, no.1, 141 -155
Borgi, et. al.  Effectiveness of a Standardized Equine-Assisted Therapy Program for Children with Autism Spectrum Disorder, Journal of Autism and Developmental Disorders, ISSN 0162-3257, J Autism Dev Disord, DOI 10.1007/s10803-015-2530-6
Stergiou A1, Tzoufi M, Ntzani E, Varvarousis D, Beris A, Ploumis A., Therapeutic Effects of Horseback Riding Interventions: A Systematic Review and Meta-analysis., Am J Phys Med Rehabil. 2017 Mar 1. doi: 10.1097/PHM.0000000000000726.   This paper includes an excellent bibliography.