K. Levin and
Q.J. Chen, in
Ultracold Fermi
Gases, Proc. Int'l School of Physics "Enrico Fermi", Course CLXIV,
Varenna, Italy, June 20-30, 2006, ed. by M. Inguscio, W. Ketterle, and
C. Salomon (IOS Press, Amsterdam), pp. 751-778, 2008;
arXiv:cond-mat/0610006
(Lecture given at the International School of Physics "Enrico Fermi" --
the 2006 Varenna Summer School on "Ultracold Fermi Gases", June 20-30,
2006).