@article{MS2_1957__5_165659,
     author = {WILLIAM HANF},
     title = {On some fundamental problems concerning isomorphism of {Boolean} algebras},
     journal = {Mathematica Scandinavica},
     pages = {205--217},
     publisher = {mathdoc},
     volume = {5},
     year = {1957},
     zbl = {0081.26101},
     url = {http://geodesic.mathdoc.fr/item/MS2_1957__5_165659/}
}