@article{MAN_1965__162_161328,
     author = {J.B. DIAZ and F.T. METCALF},
     title = {Complementary {Inequalities.} {III.}  {Inequalities} {Complementary} to {Schwarz's} {Inequality} in {Hilbert} {Space.}},
     journal = {Mathematische Annalen},
     pages = {120--139},
     publisher = {mathdoc},
     volume = {162},
     year = {1965},
     zbl = {0135.34702},
     url = {http://geodesic.mathdoc.fr/item/MAN_1965__162_161328/}
}