Mikkel Bundgaard Jens Chr. Godskesen Bjørn Haagensen Hans Hüttel Decidable Fragments of a Higher Order Calculus with Locations. 113-138 2009 242 Electr. Notes Theor. Comput. Sci. 1 http://dx.doi.org/10.1016/j.entcs.2009.06.016 db/journals/entcs/entcs242.html#BundgaardGHH09