BRST Cohomology of the Superstring in Super-Beltrami Parametrization
  A method for the calculation of the BRST cohomology, recently developed for 2D gravity theory and the bosonic string in the Beltrami parametrization,is generalised to the superstring theories quantized in super-Beltrami parametrization. 
Liviu T\u{a}taru and Ion V.Vancea (Department of Theoretical Physics,   University of Cluj-Napoca, Romania)