Bo Liu Yan Wang Zhiping Yu Leibo Liu Miao Li Zheng Wang Jing Lu Francisco V. Fernández Analog circuit optimization system based on hybrid evolutionary algorithms. 137-148 2009 42 Integration 2 http://dx.doi.org/10.1016/j.vlsi.2008.04.003 db/journals/integration/integration42.html#LiuWYLLWLF09