@article{10_1155_S1024123X01001594,
     author = {Lee, H. W. J. and Cai, X. Q. and Teo, K. L.},
     title = {An optimal control approach to manpower planning problem.},
     journal = {Mathematical Problems in Engineering},
     pages = {155},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2001},
     doi = {10.1155/S1024123X01001594},
     zbl = {1048.90129},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.1155/S1024123X01001594/}
}