"Variétés différentiables." . . "Mathematisches Institut der Universität (Bonn)." . . . . "S¹-actions and the [alpha]-invariant of their involutions" . . . "S¹-Actions and the [alpha]-invariant of their involutions"@en . . . "S1-actions and the a-invariant of their involutions" . . . "S1-actions and the -invariant of their involutions"@en . . . . . . "S [sup] 1 - actions and the [alpha] - invariant of their involutions" . . . . "S1-actions and the invariant of their involutions" . "S 1-Actions and the alpha-invariant of their involutions" . . . "S¹actions and the invariant of their involutions" . "S(1)-Actions and the alpha-invariant of their involutions" . . . . . "S¹ actions and the invariant of their involutions" . . "S1-Actions and the Alpha-Invariant of their involutions"@en . "S1-actions and the [alpha]-invariant of their involutions" . "S1-Mannigfaltigkeit" . . "S1-actions and the alpha-invariant of their involutions" . . . . "S1-Actions and the [alpha]-invariant of their involutions" . . . "S1-Actions and the alpha-Invariant of Their : Involutions" . .