Geodesic
Bifurcations of Steiner minimal trees and minimal fillings for non-convex four-point boundaries and Steiner subratio for the Euclidean plane
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 2 (2016), pp. 48-51 Cet article a éte moissonné depuis la source Math-Net.Ru

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Bifurcation diagrams for topologies of Steiner minimal trees and minimal fillings for nonconvex four-pointed boundaries are constructed. Using this issue, the four-pointed Steiner subratio of the Euclidean plane is recieved. All configurations for which it is obtained are found. 
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     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},
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E. I. Stepanova. Bifurcations of Steiner minimal trees and minimal fillings for non-convex four-point boundaries and Steiner subratio for the Euclidean plane. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 2 (2016), pp. 48-51. http://geodesic.mathdoc.fr/item/VMUMM_2016_2_a8/

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