Xiusheng Liu, Hualu Liu. 2. J. Systems Science & Complexity, 28(3):691-701, 2015. [doi]
@article{LiuL15-20, title = {2}, author = {Xiusheng Liu and Hualu Liu}, year = {2015}, doi = {10.1007/s11424-015-2246-x}, url = {http://dx.doi.org/10.1007/s11424-015-2246-x}, researchr = {https://researchr.org/publication/LiuL15-20}, cites = {0}, citedby = {0}, journal = {J. Systems Science & Complexity}, volume = {28}, number = {3}, pages = {691-701}, }