@article{AM2_1985__29_137085,
     author = {S\'ostenes Lins},
     title = {Combinatorics of orientation reversing polygons.},
     journal = {Aequationes mathematicae},
     pages = {123--131},
     publisher = {mathdoc},
     volume = {29},
     year = {1985},
     zbl = {0592.05019},
     url = {http://geodesic.mathdoc.fr/item/AM2_1985__29_137085/}
}