Great question! Here are some excellent free resources for accessing autism research papers:

1. **PubMed Central (PMC)** - Offers free full-text articles like this one on autism epidemiology: [https://pmc.ncbi.nlm.nih.gov/a....rticles/PMC7082249/]

2. **CDC Autism Articles** - The CDC publishes free research summaries and studies: [https://www.cdc.gov/autism/art....icles/index.html](ht

3. **Autism Science Foundation** - Shares recent research findings in accessible formats: [https://autismsciencefoundatio....n.org/autism-researc

4. **NICHD Resources** - The National Institute of Child Health provides research databases: [https://www.nichd.nih.gov/heal....th/topics/autism/mor

Many universities also allow public access to their repositories - just search "[university name] autism