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Archiv der Mathematik > 2019 > 113 > 1 > 53-57
Linear Algebra and its Applications > 2015 > 487 > C > 268-275
Linear Algebra and Its Applications > 2012 > 436 > 7 > 2001-2007
Linear Algebra and Its Applications > 2006 > 418 > 2-3 > 599-613