@article{PORMA_1997__54_3_47889,
     author = {Yi, F. and Shih, T.M. and Yong, J.},
     title = {Optimal control for the boundary flux to the continuous casting problem.},
     journal = {Portugaliae mathematica},
     pages = {363--379},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {1997},
     zbl = {0890.49001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1997__54_3_47889/}
}