Author: Kiosak, Volodymyr A.
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Chepurna, Olena E.; Kiosak, Volodymyr A.; Mikeš, Josef:
On geodesic mappings preserving the Einstein tensor.
(English).
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica,
vol. 49
(2010),
issue 2,
pp. 49-52
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Hinterleitner, Irena; Kiosak, Volodymyr A.:
$\phi({\rm Ric})$-vector fields in Riemannian spaces.
(English).
Archivum Mathematicum,
vol. 44
(2008),
issue 5,
pp. 385-390
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