Mark Farag, Erhard Aichinger,
"On when the multiplicative center of a near-ring is a subnear-ring"
, in Aequationes Mathematicae, Vol. 68, Nummer 1-2, Seite(n) 46-59, 2004, ISSN: 0001-9054
Original Titel:
On when the multiplicative center of a near-ring is a subnear-ring