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@article{MZ_1957__68_169693, author = {F.V. Atkinson}, title = {Estimation of an {Eigen-Value} {Occurring} in a {Stability} {Problem.}}, journal = {Mathematische Zeitschrift}, pages = {82--99}, publisher = {mathdoc}, volume = {68}, year = {1957}, zbl = {0078.07503}, url = {http://geodesic.mathdoc.fr/item/MZ_1957__68_169693/} }
F.V. Atkinson. Estimation of an Eigen-Value Occurring in a Stability Problem.. Mathematische Zeitschrift, Tome 68 (1957), pp. 82-99. http://geodesic.mathdoc.fr/item/MZ_1957__68_169693/