@article{CTGDC_2010__51_3_224_0, author = {Kock, Anders}, title = {Abstract projective lines}, journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques}, volume = {51}, year = {2010}, pages = {224-240}, mrnumber = {2731719}, zbl = {1223.51001}, language = {en}, url = {http://dml.mathdoc.fr/item/CTGDC_2010__51_3_224_0} }
Kock, Anders. Abstract projective lines. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 51 (2010) pp. 224-240. http://gdmltest.u-ga.fr/item/CTGDC_2010__51_3_224_0/
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