@article{AM2_1987__34_137235,
     author = {V. Bangert},
     title = {The existence of gaps in minimal foliations.},
     journal = {Aequationes mathematicae},
     pages = {153--166},
     year = {1987},
     volume = {34},
     zbl = {0645.58017},
     url = {http://geodesic.mathdoc.fr/item/AM2_1987__34_137235/}
}