Effects of residual flow and habitat fragmentation on distribution and movement of bullhead (Cottus gobio L.) in an alpine stream - Sabine Fischer; Helmut Kummer (Hydrobiologia, 2000)

Cytochrome b 558 and hydrogen peroxide production in small intensely fluorescent cells of sympathetic ganglia - W. Kummer; Helmut Acker (Histochemistry and Cell Biology, 1997)