Superstrings and WZNW Models
  We give a brief review of our approach to the quantization of superstrings. New is a covariant derivation of the measure at tree level and a path integral formula for this measure. 
P. A. Grassi (YITP, Stony Brook, DISTA, Univ. Piemonte Orientale),   G.Policastro (DAMTP, Cambridge), and P. van Nieuwenhuiz...