Kaplansky, Irving.
Fields and Rings / - Second Ed. / - Chicago : University of Chicago Press , 1972 - p.206 :
0-226-42450-2
Rings
B25 / K5,L2K
Fields and Rings / - Second Ed. / - Chicago : University of Chicago Press , 1972 - p.206 :
0-226-42450-2
Rings
B25 / K5,L2K