Ghost field realizations of the spinor $W_{2,s}$ strings based on the   linear W(1,2,s) algebras
  It has been shown that certain W algebras can be linearized by the inclusion of a spin-1 current. This Provides a way of obtaining new realizations of the W algebras. In this paper, we investigate the new ghost field realizations of the W(2,s)(s=3,4) algebras, making use of the fact that these two algebras can be linearized. We then construct the nilpotent BRST charges of the spinor non-critical W(2,s) strings with these new realizations. 
Yu-Xiao Liu, Li-Jie Zhang, Ji-Rong Ren