@article{GDZPPN002309157,
title = {Tight Polyhedral Klein Bottles, Projective Planes, and M\"obius Bands.},
journal = {Mathematische Annalen},
volume = {212},
year = {1974},
pages = {233-244},
zbl = {0275.57005},
url = {http://dml.mathdoc.fr/item/GDZPPN002309157}
}
Banchoff, Thomas F. Tight Polyhedral Klein Bottles, Projective Planes, and Möbius Bands.. Mathematische Annalen, Tome 212 (1974) pp. 233-244. http://gdmltest.u-ga.fr/item/GDZPPN002309157/