1Huan Zhong-dan,Zhang Zhong-ren.A Necessary and Sufficient Condition of Positive Solutions to the BSZ Transformation Model[].Shimane Journal of Policy Studies.2005
2Huan Zhong-dan,Zhang Zhong-ren.A Necessary and Sufficient Condition of Positive Solutions to the BSZ Transformation Model[].Shimane Journal of Policy Studies.2005