François Garillot Georges Gonthier Assia Mahboubi Laurence Rideau Packaging Mathematical Structures. 327-342 2009 TPHOLs http://dx.doi.org/10.1007/978-3-642-03359-9_23 conf/tphol/2009 db/conf/tphol/tphol2009.html#GarillotGMR09