Because thimerosal was removed from vaccines several years ago and the prevalence of autism has continued to
increase, then thimerosal in vaccines was not a cause of autism.

Centers for Disease Control (retrieved November 2011).
Mercury and Vaccines (Thimerosal).
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Environmental Protection Agency (retrieved November 2011).
What you need to know about mercury in fish and shellfish.
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Howard, J.S., Sparkman, C.R., Cohen, H.G., Green, G., & Stanislaw, H. (2005).
A comparison of intensive behavior analytic and eclectic treatments for young children with autism.  Research in Developmental Disabilities, 26, 359-383.

Hviid, A., Stellfeld, M., Wohlfahrt, J., & Melbye, M. (2003). Association between thimerosal-containing vaccine and autism.
Journal of the American Medical Association, 290, 1763-1766.

New York Times – Harris, G., & O’Connor, A. (June 25, 2005).
On autism’s cause, it’s parents vs. research.
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Hurley, A.M., Tadrous, M., & Miller, E.S. (2010)
Thimerosal-Containing Vaccines and Autism: A Review of Recent Epidemiologic Studies
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Sallows, G.O., & Graupner, T.D. (2005).
Intensive behavioral treatment for children with autism: Four-year outcome and predictors. AJMR, 110, 417-438.

Shattuck, P. (2006).
The contribution of diagnostic substitution to the growing administrative prevalence of autism in US special education.
Pediatrics, 117, 1028-1037.

Wing, L. & Potter, D. (2002).
The epidemiology of autistic spectrum disorders: Is the prevalence rising?
Mental Retardation and Developmental Disabilities Research Reviews, 8(3), 151-161.