@article{M2AN_1970__4_3_118_0,
     author = {Maitre, J. F.},
     title = {Br\`eve communication. {Sur} la s\'eparation des valeurs propres d'une matrice positive},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {118--124},
     publisher = {Dunod},
     address = {Paris},
     volume = {4},
     number = {R3},
     year = {1970},
     mrnumber = {296090},
     zbl = {0226.15003},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/M2AN_1970__4_3_118_0/}
}