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- [38] ZIG-ZAG REPRESENTATIONS AND INVERSE SEMIGROUPS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1974, 21 (01): : A106 - A106
- [39] Modeling and application of Zig-zag transformer Dianli Zidonghua Shebei / Electric Power Automation Equipment, 2007, 27 (12): : 93 - 95