Euclidean Hypersurfaces with Isometric Gauss Maps. Marcos Dajczer; Detlef Gromoll — 1986 Mathematische Zeitschrift
On Metrics on S2 All of Whose Geodesics Are Closed. Karsten Grove; Detlef Gromoll Inventiones mathematicae
The Weierstrass representation for complete minimal real Kaehler submanifolds of codimension two. Marcos Dajczer; Detlef Gromoll — 1995 Inventiones mathematicae
A generalization of Berger's rigidity theorem for positively curved manifolds Detlef Gromoll; Karsten Grove — 1987 Annales scientifiques de l'École Normale Supérieure