SUWAN K., HATANO S., KONGTAWELERT P., POTHACHAROEN P., and WATANABE H. “Alteration of Chondroitin Sulfate Composition on Proteoglycan Produced by Knock-in Mouse Embryonic Fibroblasts Whose Versican Lacks the A Subdomain”. Upsala Journal of Medical Sciences, vol. 114, no. 2, July 2009, pp. 73-81, doi:10.1080/03009730902761722.