"Linear Generator for a Free Piston Stirling Engine." Journal
          of Electrical and Electronics Engineering 7.1 (2014): 111-116.
          ResearchGate. Web. 15 Apr. 2017.
          <https://www.researchgate.net/publication
/296445589_Linear_Generator_for_a_Free_Piston_Stirling_Engine>.
        
        
Websites:
          
        
"Chapter 2b - Beta Type Stirling Engines." Beta Type
            Stirling Engines. Ohio University, n.d. Web. 15 Apr.
          2017. 
          <https://www.ohio.edu/mechanical/stirling/beta.html>.
        
"Robert Stirling (1790-1878)." The University of Edinburgh,
          29 June 2016. Web. 15 Apr. 2017.
          <https://www.ed.ac.uk/alumni/services/notable-alumni-in-history/robert-stirling>.
        
Stirling Enignes - How They Work. Youtube, 30 Mar.
          2014. Web. 15 Apr. 2017. <https://www.youtube.com/watch?v=gQb2sN6UWkA>.
        
Professor: David Newman, Ph.D.
            Course: PHYS 212
            Semester: Spring 2017
            Student: Riley Bickford