求助以下文献，急用。每篇文献5个币。

[1] Morasch. Moral hazard and optimal contract form for R&D cooperation [J]. Journal of Economic behavior & organization, 1995, 28(1):63-78.

[2] Kim SK，Wang SS. Linear Contract and the double moral-hazard [J]. Journal of Economic Theory, 1998, 82(2):342-378.

[3] Corbett JC, Decroix GA, Ha AY. Optimal shared-savings contract in supply chain: Linear Contract and double moral-hazard [J]. European Journal of Operational Research, 2005, 163(3): 653-667.