Plane rotations and Hamilton-Dirac mechanics
Paal, Eugen
;
Virkepu, Jüri
Czechoslovak journal of physics
2005
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p. 1503-1508
https://link.springer.com/article/10.1007/s10582-006-0032-7
Альтернативное (косое) произведение двух векторов на плоскости
Garšnek, Aleksander
Õppemetoodika küsimusi ; 13
1976
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lk. 106-122
https://www.ester.ee/record=b1346720*est