Determination of the best debt ratio for the real estate corporation
ma xin 1; li hui min 2; shi dong 3 (1.school of civil engineering; chang an university; xi an 710061; china; 2.college of civil engineering; xi an univ.of arch.& tech.; xi an 710055; china; 3.department of construction engineering; xi an petroleum institute; xi an 710065; china)
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