@article{ASENS_1987_4_20_2_227_0,
     author = {Gromoll, Detlef and Grove, Karsten},
     title = {A generalization of {Berger's} rigidity theorem for positively curved manifolds},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {227--239},
     publisher = {Elsevier},
     volume = {Ser. 4, 20},
     number = {2},
     year = {1987},
     doi = {10.24033/asens.1530},
     mrnumber = {88k:53062},
     zbl = {0626.53032},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.1530/}
}