NORD - Olivopontocerebellar Atrophy - Offers synonyms, a general discussion and further resources. - http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Olivopontocerebellar%20Atrophy%2C%20Hereditary
NINDS: Olivopontocerebellar Atrophy - Information sheet compiled by National Institute of Neurological Disorders and Stroke. - http://www.ninds.nih.gov/health_and_medical/disorders/opca_doc.htm
Opca Awareness - A site devoted to Olivopontocerebellar Atrophy. It has links, personal stories and a discussion board. - http://alyshia.com/opca