Loskiel, Georg H.: Historiske Beskrifning, Öfwer Evangeliska Brödernes Missions-Arbete Ibland Indianerne uti Norra America (1792)
Samuel Hearnes Resa Til Norra Americas Ishaf, samt En obekant Engelsmans Resor Bland Canadas Wildar (1798)
Vining, Edward P.: An Inglorious Columbus; or, evidence that Hwui Shan and party of buddhist monks from Afghanistan discovered America in the fifth century, A.D.
