@article{PORMA_1958__17_4_114807,
     author = {Halpern, Edward},
     title = {On the structure of hyperalgebras. {Class} 1 {Hopf} algebras},
     journal = {Portugaliae mathematica},
     pages = {127--147},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1958},
     mrnumber = {0111023},
     zbl = {0095.02505},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1958__17_4_114807/}
}