@article{AM2_1981__23_136892,
     author = {John Isbell},
     title = {Zero sets of polynomials in finite rings.},
     journal = {Aequationes mathematicae},
     pages = {76--79},
     year = {1981},
     volume = {23},
     zbl = {0517.16016},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__23_136892/}
}