@article{RSMUP_1978__59__51_0,
     author = {Herstein, I. N. and Rowen, Louis H.},
     title = {Rings radical over {P.I.} subrings},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {51--55},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {59},
     year = {1978},
     mrnumber = {547078},
     zbl = {0437.16005},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1978__59__51_0/}
}