A.P. Willmott and C.P. Ellington.
  <b>The mechanics of flight in the hawkmoth Manduca sexta .1.
  Kinematics of hovering and forward flight</b>.
  <i>Journal of Experimental Biology</i>, 200(21):2705-2722, 1997.
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Willmott-1997-MFH.bib">(bibtex:
  Willmott-1997-MFH)</A>.<br />