总共三篇，希望哪位高手能够帮忙找找，在此先谢过了。

第一篇
【作者(必填)】Volpi N, Mascellani G, Bianchini P.

【文题(必填)】Low molecular weight heparins (5 kDa) and oligoheparins (2 kDa) produced by gel permeation enrichment or radical process: comparison of structures and physicochemical and biological properties

【年份(必填)】1992

【全文链接或数据库名称(选填)】Anal Biochem. 200(1):100-7

第二篇
【作者(必填)】Huizeng F, Shifu Wu, Yimin Li

【文题(必填)】Holoturian Glycosaminoglycan sufractions: Their preparation, physic-chemical characteristic and anticoagulant properties

【年份(必填)】1993

【全文链接或数据库名称(选填)】Chinnese Biochemical Jpurnal, 9(2): 146- 151

第三篇
【作者(必填)】Volpi N

【文题(必填)】Dermatan sulfate from beef mucosa: structure, physicochemical and biological properties of fractions prepared by chemical depolymerization and anion-exchange chromatography

【年份(必填)】1994
【全文链接或数据库名称(选填)】Carbohydr Res. 255:133-144