Characterization of di- and monosulfated, unsaturated heparin disaccharides with terminal N-sulfated 1,6-anhydro-β-D-glucosamine or N-sulfated 1,6-anhydro-β-D-mannosamine residues - Mascellani,G.; Guerrini,M.; Torri,G.; Liverani,L.; Spelta,F.; Bianchini,P. (Carbohydr Res, 2007)