Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{EUG_1995__44_a8, author = {Thanassis Chryssakis}, title = {A -range and \ensuremath{\varphi}- spatial {Numerical} range of a {Tensor}}, journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma} }, pages = {71-85}, publisher = {mathdoc}, volume = {44}, year = {1995}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/EUG_1995__44_a8/} }
Thanassis Chryssakis. A -range and φ- spatial Numerical range of a Tensor. Ευκλείδης Γ , Tome 44 (1995), p. 71-85. http://geodesic.mathdoc.fr/item/EUG_1995__44_a8/