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@article{KJM_2010_33_a1, author = {Vladica Andreji\'c}, title = {Strong duality principle for four-dimensional {Osserman} manifolds}, journal = {Kragujevac Journal of Mathematics}, pages = {17 }, publisher = {mathdoc}, volume = {33}, year = {2010}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KJM_2010_33_a1/} }
Vladica Andrejić. Strong duality principle for four-dimensional Osserman manifolds. Kragujevac Journal of Mathematics, Tome 33 (2010), p. 17 . http://geodesic.mathdoc.fr/item/KJM_2010_33_a1/