南京林业大学学报（自然科学版）
Fuzzy Theory Application in Surrounding Rock Classification and in Highway Tunnel
LI Xi-sheng1, ZHAI Cun-lin2
JOURNAL OF NANJING FORESTRY UNIVERSITY . 2006, (03): 55 -58 .  DOI: 10.3969/j.jssn.1000-2006.2006.03.011

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