BIBLIOGRAPHY
[1] McKay, N., and Vanderwal, J., McMaster University Custom Courseware Physics 1D03/1F03, McMaster Bookstore, Hamilton, 2003.
[2] http://ntsn2000.educ.ualberta.ca/nethowto/examples/edit435/d-snider/labl.htm
[3]http://nisee.berkley.edu/images/servlet/BrowseGodden?group=GoddenA2-8
[4] Vable, Madhukar, Mechanics of Materials,
Oxford University Press, New York, 2002.