@article{SM_2001_192_6_a2,
     author = {A. O. Ivanov and A. A. Tuzhilin},
     title = {Differential calculus on the space of {Steiner} minimal trees in {Riemannian} manifolds},
     journal = {Sbornik. Mathematics},
     pages = {823--841},
     publisher = {mathdoc},
     volume = {192},
     number = {6},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2001_192_6_a2/}
}