@article{ZNSL_1995_229_a9,
     author = {E. E. Tyrtyshnikov},
     title = {On the convergence of the $QR$ algorithm with multishifts},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {275--283},
     publisher = {mathdoc},
     volume = {229},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1995_229_a9/}
}