@article{M2AN_1997__31_7_805_0,
     author = {Tiihonen, Timo},
     title = {Shape optimization and trial methods for free boundary problems},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {805--825},
     publisher = {Elsevier},
     volume = {31},
     number = {7},
     year = {1997},
     mrnumber = {1489173},
     zbl = {0891.65131},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1997__31_7_805_0/}
}