Leonilde Rocha Varela Rita Almeida Ribeiro Evaluation of Simulated Annealing to solve fuzzy optimization problems. 59-71 2003 14 Journal of Intelligent and Fuzzy Systems 2 http://iospress.metapress.com/openurl.asp?genre=article&issn=1064-1246&volume=14&issue=2&spage=59 db/journals/jifs/jifs14.html#VarelaR03