@article{ELMA_1987__42_4_141397,
     author = {G. Archinard},
     title = {Formes quadratiques r\'eelles semi-d\'efinies. {D\'emonstration} \'el\'ementaire du crit\`ere des mineurs principaux.},
     journal = {Elemente der Mathematik},
     pages = {25--31},
     publisher = {mathdoc},
     volume = {42},
     number = {4},
     year = {1987},
     zbl = {0701.15024},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1987__42_4_141397/}
}