A characterization of the norm of an Azumaya algebra of constant rank through the divided powers algebra of an algebra Dieter Ziplies (1986) Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry
An angle metric through the notion of Grassmann representative. Kalogeropoulos, Grigoris I., Karageorgos, Athanasios D., Pantelous, Athanasios A. (2009) ELA. The Electronic Journal of Linear Algebra [electronic only]
An easily computable invariant of trilinear alternating forms Jaroslav Hora (2010) Acta Universitatis Carolinae. Mathematica et Physica
An invariant of 2 × 2 matrices. Cisneros-Molina, José Luis (2005) ELA. The Electronic Journal of Linear Algebra [electronic only]
Automorphismen und Antiautomorphismen von Tensoralgebren. Heinz-Georg Quebbemann (1978) Mathematische Zeitschrift