@article {IOPORT.50321259,
    author       = {Bau, Yoon-Teck and Ho, Chin Kuan and Ewe, Hong Tat},
    title        = {Ant colony optimization approaches to the degree-constrained minimum spanning tree problem},
    year         = {2008},
    journal      = {J. Inf. Sci. Eng.},
    volume       = {24},
    number       = {4},
    pages        = {1081-1094},
    identifier   = {50321259},
}