Helgstrand, Charlotte; Wikoff, William R; Duda, Robert L; Hendrix, Roger W; Johnson, John E; Liljas, Lars. The Refined Structure of a Protein Catenane: The HK97 Bacteriophage Capsid at 3.44Å Resolution. Journal of Molecular Biology. 1 December 2003, 334 (5): 885–899. PMID 14643655. doi:10.1016/j.jmb.2003.09.035.
Helgstrand, Charlotte; Wikoff, William R; Duda, Robert L; Hendrix, Roger W; Johnson, John E; Liljas, Lars. The Refined Structure of a Protein Catenane: The HK97 Bacteriophage Capsid at 3.44Å Resolution. Journal of Molecular Biology. 1 December 2003, 334 (5): 885–899. PMID 14643655. doi:10.1016/j.jmb.2003.09.035.