Production and some unusual properties of levan, a polymer of D-fructose from special Zymomonas mobilis strainKarsakevich, A.; Vina, I.; Gonta, S.; Linde, R.; Bekers, M.BIOBALT '96 : Biotechnology in Estonia, Latvia and Lithuania : International Workshop, 19-20 April, 1996, Tartu, Estonia : abstract book1996 / p. 21