@article{SMJ_1933-1934__1__A3_0,
     author = {de Possel, R.},
     title = {Grandeurs idempotentes},
     journal = {S\'eminaire de Math\'ematiques},
     note = {talk:3},
     pages = {1--11},
     year = {1933-1934},
     publisher = {\'Ecole Normale Sup\'erieure},
     volume = {1},
     language = {fr},
     url = {https://www.numdam.org/item/SMJ_1933-1934__1__A3_0/}
}