@article{CHEB_2021_22_4_a13,
     author = {A. M. Tropin},
     title = {On the bifurcation of the solution of the {Fermat--Steiner} problem under $1$-parameter variation of the boundary in $H(\mathbb{R}^2)$},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {265--288},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2021_22_4_a13/}
}