@article{00894084, title = {On minimax theory in two Hilbert spaces.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {19}, year = {1996}, pages = {521-528}, doi = {10.1155/S0161171296000725}, zbl = {0853.49008}, language = {en}, url = {http://dml.mathdoc.fr/item/00894084} }
El-Kholy, E.M.; Abdou, Hanan Ali. On minimax theory in two Hilbert spaces.. International Journal of Mathematics and Mathematical Sciences, Tome 19 (1996) pp. 521-528. doi : 10.1155/S0161171296000725. http://gdmltest.u-ga.fr/item/00894084/