Sunhwan Jo and Wonpil Im (2013)
Glycan fragment database: a database of PDB-based glycan 3D structures.
Nucleic acids research, 41(D1), D470-D474.

S-J. Park, J. Lee, D.S. Patel, H. Ma, H.S. Lee, S. Jo, and W. Im (2017)
Glycan Reader is Improved to Recognize Most Sugar Types and Chemical Modifications in the Protein Data Bank.
Bioinformatics 19:3051-3057