@article{ASENS_1960_3_77_2_167_0,
     author = {Katznelson, Y.},
     title = {Sur les alg\`ebres dont les \'el\'ements non n\'egatifs admettent des racines carr\'ees},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {167--174},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 77},
     number = {2},
     year = {1960},
     doi = {10.24033/asens.1090},
     mrnumber = {22 #12403},
     zbl = {0099.10201},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.1090/}
}