@article{CMH_1947__20_138920,
     author = {J. Sz\'ep},
     title = {On finite groups which are necessarily commutative.},
     journal = {Commentarii mathematici Helvetici},
     pages = {223--224},
     publisher = {mathdoc},
     volume = {20},
     year = {1947},
     zbl = {0035.01502},
     url = {http://geodesic.mathdoc.fr/item/CMH_1947__20_138920/}
}