@article{MAN_1979__244_163291,
     author = {Jens Peter Reuss Christensen and J. Vesterstrom},
     title = {A {Note} on {Extreme} {Positive} {Definite} {Matrices.}},
     journal = {Mathematische Annalen},
     pages = {65--68},
     publisher = {mathdoc},
     volume = {244},
     year = {1979},
     zbl = {0396.15011},
     url = {http://geodesic.mathdoc.fr/item/MAN_1979__244_163291/}
}