@Inproceedings{EPTCS24.17, author = {Shen, Yuping and Zhao, Xishun}, year = {2010}, title = {NP-Logic Systems and Model-Equivalence Reductions}, editor = {Zheng, Xizhong and Zhong, Ning}, booktitle = {{\rm Proceedings Seventh International Conference on} Computability and Complexity in Analysis, {\rm Zhenjiang, China, 21-25th June 2010}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {24}, publisher = {Open Publishing Association}, pages = {130-138}, doi = {10.4204/EPTCS.24.17}, }