J. Rahmfeld et A. Rajaraman, Green-Schwarz string action on AdS(3)xS(3) with Ramond-Ramond charge - art. no. 064014, PHYS REV D, 6006(6), 1999, pp. 4014
We derive the classical kappa-symmetric type IIB string action on AdS(3) X
S-3 by employing the SU(1,1/2)(2) algebra. We then gauge fix the kappa symm
etry in the background adapted Killing spinor gauge and present the action
in a very simple form. [S0556-2821(99)01216-3].