Bush, John W. M. "Surface tension." New Trends in the Physics and Mechanics of Biological Systems: Lecture Notes of the Les Houches Summer School: Volume 92, July 2009. : Oxford University Press, 2011-05-26. Oxford Scholarship Online. 2011-09-22. Date Accessed 25 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199605835.001.0001/acprof-9780199605835-chapter-2>.
Bush, J.(2011-05-26). Surface tension. In New Trends in the Physics and Mechanics of Biological Systems: Lecture Notes of the Les Houches Summer School: Volume 92, July 2009. : Oxford University Press. Retrieved 25 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199605835.001.0001/acprof-9780199605835-chapter-2.
Bush, John W. M. "Surface tension." In New Trends in the Physics and Mechanics of Biological Systems: Lecture Notes of the Les Houches Summer School: Volume 92, July 2009. : Oxford University Press, 2011-05-26. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199605835.001.0001/acprof-9780199605835-chapter-2.
Bush JWM. Surface tension. In: Ben Amar M, Goriely A, Müller MM, Cugliandolo L. New Trends in the Physics and Mechanics of Biological Systems: Lecture Notes of the Les Houches Summer School: Volume 92, July 2009. Oxford University Press; 2011. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199605835.001.0001/acprof-9780199605835-chapter-2. Accessed May 25, 2013.