2008. Barbary Macaque: Macaca sylvanus, GlobalTwitcher.com, ed. Nicklas Stromberg Архивирано на 31 август 2009 г. Algerian Ministry of Forestry - National
Cronstedt“. Svenskt biografiskt lexikon. Посетено на September 1, 2020. „Klas Stromberg, riksråd“. Svenskt biografiskt handlexikon. Посетено на September 1, 2020
Hogan (2008) Polar Bear: Ursus maritimus, Globaltwitcher.com, ed. Nicklas Stromberg Oil and Gas Resources in North-West Russia (2008) [3] S. A. Ogorodov (2004)
Београд, 1995. (српски) Introduction to Classical Real Analysis, by Karl R. Stromberg; Wadsworth, 1981 (see also) (англиски) Historical Essay On Continuity