@article{MAN_1974__207_162542,
     author = {Thomas F. Banchoff},
     title = {Tight {Polyhedral} {Klein} {Bottles,} {Projective} {Planes,} and {M\"obius} {Bands.}},
     journal = {Mathematische Annalen},
     pages = {233--244},
     publisher = {mathdoc},
     volume = {207},
     year = {1974},
     zbl = {0275.57005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1974__207_162542/}
}