@article{COCV_2014__20_1_1_0,
     author = {Buttazzo, Giuseppe and Ruffini, Berardo and Velichkov, Bozhidar},
     title = {Shape optimization problems for metric graphs},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {1--22},
     publisher = {EDP-Sciences},
     volume = {20},
     number = {1},
     year = {2014},
     doi = {10.1051/cocv/2013050},
     mrnumber = {3182688},
     zbl = {1286.49050},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv/2013050/}
}