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@article{MZ_1968__103_170916, author = {G.M. Petersen}, title = {Singularities for {Matrices} and {Sequences.}}, journal = {Mathematische Zeitschrift}, pages = {268--275}, publisher = {mathdoc}, volume = {103}, year = {1968}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MZ_1968__103_170916/} }
G.M. Petersen. Singularities for Matrices and Sequences.. Mathematische Zeitschrift, Tome 103 (1968), pp. 268-275. http://geodesic.mathdoc.fr/item/MZ_1968__103_170916/