An extension of Venn diagrams.
Fitzpatrick, P. J.
Notre Dame J. Formal Logic, Tome 14 (1973) no. 1, p. 77-86 / Harvested from Project Euclid
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Publié le : 1973-01-14
Classification:  02B05,  02-01 
@article{1093890810,
     author = {Fitzpatrick, P. J.},
     title = {An extension of Venn diagrams.},
     journal = {Notre Dame J. Formal Logic},
     volume = {14},
     number = {1},
     year = {1973},
     pages = { 77-86},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1093890810}
}

Fitzpatrick, P. J. An extension of Venn diagrams.. Notre Dame J. Formal Logic, Tome 14 (1973) no. 1, pp.  77-86. http://gdmltest.u-ga.fr/item/1093890810/