Existence of", Routledge Encyclopedia of Philosophy, Routledge, 2000. Jan Assmann, Religion and Cultural Memory: Ten Studies, Stanford University Press 2005
2004, p. 85 Baines, in Loprieno 1996, pp. 364–365 Tobin 1989, pp. 27–31 Assmann 2001, pp. 77–80 Allen 2000,第79–80頁. sfn模板錯誤: 無指向目標: CITEREFAllen2000 (幫助)
1902年,法國氣象學家德博(法语:Léon Teisserenc de Bort)和德國氣象學家阿斯曼(德语:RichardAßmann (Meteorologe))經過協調,分別發表了各自多年觀察的結果。他們依據高空氣球儀表所記錄到的溫度,在高度約11~14公里處發現一個等溫層(isothermal