Günter Pilz, Henry E. Heatherly, Gary Birkenmeier,
"Near-Rings and Rings Generated by Homomorphisms on Groups"
, in G. Saad and M.J.Thomsen: Near-Rings, Near-Fields, and K-Loops, Vol. 426, Kluwer, Seite(n) 199-210, 1997, ISBN: 0-7923-4799-4
Original Titel:
Near-Rings and Rings Generated by Homomorphisms on Groups