@article{10_4064_sm_8_1_135_140,
     author = {A. Wintner},
     title = {On normal inertia},
     journal = {Studia Mathematica},
     pages = {135--140},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1939},
     doi = {10.4064/sm-8-1-135-140},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-8-1-135-140/}
}