@article{10_4153_CMB_1995_069_1,
     author = {Polster, B.},
     title = {Cut and {Paste} in {2-Dimensional} {Projective} {Planes} and {Circle} {Planes}},
     journal = {Canadian mathematical bulletin},
     pages = {469--480},
     year = {1995},
     volume = {38},
     number = {4},
     doi = {10.4153/CMB-1995-069-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1995-069-1/}
}