Sc. Zhao et al., Spinor field Becchi-Rouet-Stora-Tyutin charges of W-2,W-5 string and W-5 string - art. no. 046010, PHYS REV D, 6404(4), 2001, pp. 6010
In this paper, the spinor field Becchi-Rouet-Stora-Tyutin (BRST) charges of
the W-2,W-5 strings and the W-5 string are constructed, in which the gradi
ng BRST method is used.