Fuzzy functions and an extension of the category L-Top of Chang-Goguen   L-topological spaces
  We study FTOP(L), a fuzzy category with fuzzy functions in the role of morphisms. This category has the same objects as the category L-TOP of Chang-Goguen L-topological spaces,but an essentially wider class of morphisms - so called fuzzy functions introduced earlier in our joint work with U. Hohle and H. Porst. 
Alexander P. Sostak