@article{SM_2021_212_1_a1,
     author = {A. Kh. Galstyan and A. O. Ivanov and A. A. Tuzhilin},
     title = {The {Fermat-Steiner} problem in the space of compact subsets of~$\mathbb R^m$ endowed with the {Hausdorff} metric},
     journal = {Sbornik. Mathematics},
     pages = {25--56},
     publisher = {mathdoc},
     volume = {212},
     number = {1},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2021_212_1_a1/}
}