@article{ZNSL_2010_382_a9,
     author = {L. Yu. Kolotilina},
     title = {On {Ostrowski's} disk theorem and lower bounds for the smallest eigenvalues and singular values},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {125--140},
     publisher = {mathdoc},
     volume = {382},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2010_382_a9/}
}