Shah, Rawn; Romine, James.Playing MUDs on the Internet.— John Wiley & Sons, Inc., 1995.— С.98—99.— ISBN 0-471-11633-5.. — «Some Muds are completely dependant on player-killing, and have wars that start every half hour or so. These Muds are becoming more common, basing a lot of their ideas on the extremely popular LPmud known as Genocide.».
Bartle, Richard[англ.].Designing Virtual Worlds[англ.].— New Riders, 2003.— С.407.— ISBN 0-13-101816-7.. — «Group versus Group (GvG). Players are members of groups that are in conflict with other groups. In a combat situation, this means PCs can fight any PCs who are members of enemy groups but not those who are members of their own (or a neutral) group.63 [...] 63This is often known as Realm versus Realm (RvR), as it was popularized under this name in Dark Age of Camelot.».
Bartle, Richard[англ.].Designing Virtual Worlds[англ.].— New Riders, 2003.— С.411.— ISBN 0-13-101816-7.. — «The term RvR comes from Dark Age of Camelot, but it's not the only virtual world to use this approach; indeed, it's not the only big, graphical world to do so. Anarchy Online has characters divided into three groups, with people meeting in PvP areas for combat. Lineage has clan-like groups called bloodpledges, which can conquer castles from one another in (scheduled) sieges; success here has material results, in that owners of castles get tax income they can invest in preparing for the next siege.».
Reese, George.LPMud Timeline(11 марта 1996).— «January 1992 ¶ _Genocide_ starts as the first MUD dedicated totally to inter-player conflict, which is a fancy way of saying that its theme is creatively player-killing.»Дата обращения: 14 апреля 2010.Архивировано из оригинала 26 февраля 2012 года.
Reese, George.LPMud Timeline(11 марта 1996).— «January 1992 ¶ _Genocide_ starts as the first MUD dedicated totally to inter-player conflict, which is a fancy way of saying that its theme is creatively player-killing.»Дата обращения: 14 апреля 2010.Архивировано из оригинала 26 февраля 2012 года.
