-mapping requests for its own Internet address with a different
-Ethernet address, generally indicating that two hosts are attempting
-to use the same Internet address.
-.SH SEE ALSO
-inet(4), route(4), arp(8), ifconfig(8), route(8)
-.br
-``An Ethernet Address Resolution Protocol,'' RFC826, Dave Plummer,
-Network Information Center.
-.br
-``Trailer Encapsulations,'' RFC893, S.J. Leffler and M.J. Karels,
-Network Information Center.
+mapping requests for its own Internet address with a different Ethernet
+address, generally indicating that two hosts are attempting to use the
+same Internet address.
+.Sh SEE ALSO
+.Xr inet 4 ,
+.Xr route 4 ,
+.Xr arp 8 ,
+.Xr ifconfig 8 ,
+.Xr route 8
+.sp
+.Rs
+.%A Plummer, D.
+.%B "An Ethernet Address Resolution Protocol"
+.%T RFC826
+.Re
+.Rs
+.%A Leffler, S.J.
+.%A Karels, M.J.
+.%B "Trailer Encapsulations
+.%T RFC893
+.Re