Schwarzkopf

Energy- and angle-resolved double photoionization in helium.

Schmidt, Schwarzkopf, Krässig, 1993, Physical review letters.

A German requiem

Brahms, Klemperer, Schwarzkopf, 1962 .

Unexpected behaviour of double photoionization in H2.

Schmidt, Kämmerling, Kossmann, 1989, Physical Review Letters.

Temperature dependence of the Shubnikov-de Haas effect in Hg1-xFexSe.

Reifenberger, Schwarzkopf, Vaziri, 1985, Physical review. B, Condensed matter.