@article{10_4064_fm_74_1_73_84,
     author = {T. Rushing},
     title = {Geometrical arguments concerning two-sided submanifolds, flat submanifolds and pinched bicollars},
     journal = {Fundamenta Mathematicae},
     pages = {73--84},
     publisher = {mathdoc},
     volume = {74},
     number = {1},
     year = {1972},
     doi = {10.4064/fm-74-1-73-84},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-74-1-73-84/}
}