@article {IOPORT.03799379,
    author       = {Johnson, D.S. and Niemi, K.A.},
    title        = {On knapsacks, partitions, and a new dynamic programming technique for trees.},
    year         = {1983},
    journal      = {Mathematics of Operations Research},
    volume       = {8},
    issn         = {1526-5471},
    pages        = {1-14},
    publisher    = {INFORMS, Hanover, MD},
    doi          = {10.1287/moor.8.1.1},
    identifier   = {03799379},
}