Poul Anderson
According to Marc Gascoigne the idea of Chaos in "Warhammer" was inspired by "The Eternal Champion" and its sequels, written by Michael Moorcock, who made use of ideas from "Three Hearts and Three Lions" by Poul Anderson. The "Warhammer" elves were inspired by "The Broken Sword" by Poul Anderson as well the Middle-earth canon of J. R. R. Tolkien.