I’m not sure what kind of report you need to write. If you need to look for serious articles on TBI- the place to look is on medline- http://www.ncbi.nlm.nih.gov/pubmed
Be aware though that they have almost 60,000 articles on TBI, so you might want to focus your search on your particular topic like “traumatic brain injury and speech” or “traumatic brain injury AND pediatric” or whatever you are writing about.
Good Luck