@article{10_21136_AM_1980_103869,
     author = {Fiedler, Miroslav},
     title = {A deflation formula for tridiagonal matrices},
     journal = {Applications of Mathematics},
     pages = {348--357},
     publisher = {mathdoc},
     volume = {25},
     number = {5},
     year = {1980},
     doi = {10.21136/AM.1980.103869},
     mrnumber = {0590488},
     zbl = {0456.65018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1980.103869/}
}