@article{VMUMM_2016_2_a8,
     author = {E. I. Stepanova},
     title = {Bifurcations of {Steiner} minimal trees and minimal fillings for non-convex four-point boundaries and {Steiner} subratio for the {Euclidean} plane},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {48--51},
     publisher = {mathdoc},
     number = {2},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2016_2_a8/}
}