@misc {IOPORT.70827143,
    author       = {Guo, Xi and Ishikawa, Yoshiharu},
    title        = {Multi-objective optimal combination queries},
    howpublished = {DEXA (1), 47-61 (2011).},
    year         = {2011},
    doi          = {10.1007/978-3-642-23088-2_4},
    identifier   = {70827143},
}