The uninvolved nature of historical research may make it acceptable in an emotionally charged situation in which other types of research would be impossible. Because of its limitations, however, caution must be exercised in generalizing the results of historical research. Students who plan to do historical study should consult appropriate bibliographies and sources on historical methodology, such as Brundage (2013), Howell and Prevenier (2001), Lange (2012), Salevouris and Furay (2015), and Storey (2004).