Geodesic
A~variational description of the spectra of totally positive matrices, and extremal problems of approximation theory
Matematičeskie zametki, Tome 47 (1990) no. 1, pp. 39-46.

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     author = {A. P. Buslaev},
     title = {A~variational description of the spectra of totally positive matrices, and extremal problems of approximation theory},
     journal = {Matemati\v{c}eskie zametki},
     pages = {39--46},
     publisher = {mathdoc},
     volume = {47},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1990_47_1_a3/}
}
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A. P. Buslaev. A~variational description of the spectra of totally positive matrices, and extremal problems of approximation theory. Matematičeskie zametki, Tome 47 (1990) no. 1, pp. 39-46. http://geodesic.mathdoc.fr/item/MZM_1990_47_1_a3/