@article{10_1017_S0017089500009952,
     author = {Jespers, E. and Parmenter, M. M.},
     title = {Units of group rings of groups of order 16},
     journal = {Glasgow mathematical journal},
     pages = {367--379},
     year = {1993},
     volume = {35},
     number = {3},
     doi = {10.1017/S0017089500009952},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500009952/}
}