@article{10_1017_S0017089500007412,
     author = {Hermann, Peter Z.},
     title = {On the product of all nonzero elements of a finite ring},
     journal = {Glasgow mathematical journal},
     pages = {325--330},
     year = {1988},
     volume = {30},
     number = {3},
     doi = {10.1017/S0017089500007412},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007412/}
}