Hanson BL, Harp JM, Kirschbaum K, Schall CA, DeWitt K, Howard A, Pinkerton AA, Bunick GJ. Experiments testing the abatement of radiation damage in D-xylose isomerase crystals with cryogenic helium. J Synchrotron Radiat. 2002 Nov 01;9(Pt 6):375–81. doi: 10.1107/s0909049502014577. PMID: 12409625.