Retaliation against at-will employees

Using the American Law Reports (ALR), provide an article that discusses retaliation against at-will employees for complaints related to health or safety. What is citation to the article? According to the article, when was the at-will doctrine first adopted? Does an employee have a cause of action against an employer who terminates an at-will employee who reports a complaint regarding health or public safety? Why or why not? Summarize in your own words; do not copy/paste.