@article{CMH_1943__16_138824,
     author = {Louis Kollros},
     title = {D\'emonstrations de formules de {Steiner.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {60--64},
     publisher = {mathdoc},
     volume = {16},
     year = {1943},
     zbl = {0028.30102},
     url = {http://geodesic.mathdoc.fr/item/CMH_1943__16_138824/}
}