1. Kazhdan's Property (T);Bekka,2008
2. Stieltjes–Pick–Bernstein–Schoenberg and their connection to complete monotonicity;Berg,2008
3. Potential Theory on Locally Compact Abelian Groups;Berg,2012
4. Vorlesungen über Fouriersche Integrale;Bochner,1932
5. Positive definite functions of a real variable;Cooper;Proc. Lond. Math. Soc.,1960