求一篇martingale and duality methods for utility maximization in an incomplete market，
作者是，Karatzas,I., Lehoczy, J.P. , Shreve, S.E. , Xu, G.-L. (1991c)
文章的名字是，martingale and duality methods for utility maximization in an incomplete market
它是在数学杂志 SIAM Journal on Control and Optimization 1991, 上发表的。

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