Odd-order Cayley graphs with commutator subgroup of order pq are   hamiltonian
  We show that if G is a nontrivial, finite group of odd order, whose commutator subgroup [G,G] is cyclic of order p^m q^n, where p and q are prime, then every connected Cayley graph on G has a hamiltonian cycle. 
Dave Witte Morris
math.CO