Människor och makter i vikingarnas värld. ISBN 91-7324-591-7 p.72 Rydberg, Viktor. Undersökningar i germanisk mythologi. runeberg.org. 1886 [2024-08-04]
1830–53 Israel Hwasser, 1854–60 Carl Vilhelm August Strandberg, 1862–77 ViktorRydberg, 1877–95 Waldemar Rudin, 1896–1921 纳坦·瑟德布卢姆, 1921–31 Tor Andræ, 1932–47
Holmlid. Very low work function surfaces from condensed excited states: Rydberg matter of cesium. Surface Science. 1992-05-15,. 269-270: 695–699. Bibcode:1992SurSc