Gall uses Rodney A. Smolla's article "Academic Freedom, Hate Speech, and the Idea of a University" as a basis for his discussion of hostile environments for free speech among colleges and universities.
Robert W. Gall,
The University as an Industrial Plant: How A Workplace Theory of Discriminatory Harassment Creates a “Hostile Environment” for Free Speech in America’s Universities,
60 Law and Contemporary Problems
Available at: http://scholarship.law.duke.edu/lcp/vol60/iss4/9