

Buckingham's pitheorem (Site not responding. Last check: 20071011) 
  Buckingham, E. On physically similar systems; illustrations of the use of dimensional equations. 
  Curtis, W.D., Logan, J.D., Parker, W.A. Dimensional analysis and the pi theorem. 
  Edgar Buckingham (1867–1940) was educated at Harvard and Leipzig, and worked at the (US) National Bureau of Standards (now the National Institute of Standards and Technology, or NIST) 19051937. 
 www.math.ntnu.no /~hanche/notes/buckingham (432 words) 
