@article{105125, author = {V\'aclav Havel}, title = {Nets and groupoids}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {008}, year = {1967}, pages = {435-451}, zbl = {0162.24001}, mrnumber = {0223956}, language = {en}, url = {http://dml.mathdoc.fr/item/105125} }
Havel, Václav. Nets and groupoids. Commentationes Mathematicae Universitatis Carolinae, Tome 008 (1967) pp. 435-451. http://gdmltest.u-ga.fr/item/105125/
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