Differential 1-forms on diffeological spaces and diffeological gluing
  This paper aims to describe the behavior of diffeological differential 1-forms under the operation of gluing of diffeological spaces along a smooth map. In the diffeological context, two constructions regarding diffeological forms are available, that of the vector space \Omega^1(X) of all 1-forms, and that of the (pseudo-)bundle \Lambda^1(X) of values of 1-forms. We describe the behavior of the former under an arbitrary gluing of two diffeological spaces, while for the latter, we limit ourselves to the case of gluing along a diffeomorphism. 
Ekaterina Pervova
math.DG