@article{RO_2018__52_1_55_0,
     author = {He, Cheng and Li, Li},
     title = {Hierarchical optimization on an unbounded parallel-batching machine},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {55--60},
     year = {2018},
     publisher = {EDP Sciences},
     volume = {52},
     number = {1},
     doi = {10.1051/ro/2017089},
     zbl = {1457.90068},
     mrnumber = {3812468},
     language = {en},
     url = {https://www.numdam.org/articles/10.1051/ro/2017089/}
}