@article{MASLO_2004_54_5_a1,
     author = {Somer, Lawrence},
     title = {On superpseudoprimes},
     journal = {Mathematica slovaca},
     pages = {443--451},
     year = {2004},
     volume = {54},
     number = {5},
     mrnumber = {2114615},
     zbl = {1108.11012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2004_54_5_a1/}
}