%0 Journal Article
%A Dragos Oprea
%T Framed sheaves over treefolds and symmetric obstruction theories
%J Documenta mathematica
%D 2013
%P 323-342
%V 18
%U http://geodesic.mathdoc.fr/articles/10.4171/dm/399/
%R 10.4171/dm/399
%F 10_4171_dm_399