@article{AM2_1980__21_182411,
     author = {Ronald R. Infante},
     title = {The structure of strongly normal difference extensions.},
     journal = {Aequationes mathematicae},
     pages = {16--19},
     publisher = {mathdoc},
     volume = {21},
     year = {1980},
     zbl = {0459.12019},
     url = {http://geodesic.mathdoc.fr/item/AM2_1980__21_182411/}
}