@article{VMUMM_2012_5_a0,
     author = {A. O. Ivanov and Z. N. Ovsyannikov and N. P. Strelkova and A. A. Tuzhilin},
     title = {One-dimensional minimal fillings with negative edge weights},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {3--8},
     year = {2012},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2012_5_a0/}
}