(1) From the perspective of the creation of works of later writers and the influence on readers. For example, Shawn Thomson's 2006 doctoral dissertation at the University of Kansas: Frontiers of Unique American Literature
(1) From the perspective of creating works for future writers and their impact on readers. As Shawn Thomson of the University of Kansas wrote his doctoral thesis in 2006: A Review of Unique American Literature
(1) From the perspective of the creation of later writers' works and the influence on readers. For example, Shawn Thomson of the University of Kansas wrote his doctoral thesis in 2006: The Frontier of American Unique Literature-On it.