Counterexamples to conjectures of Ryser and de Oliveira.
Levow, Roy B.
Pacific J. Math., Tome 49 (1973) no. 2, p. 603-606 / Harvested from Project Euclid
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Publié le : 1973-05-14
Classification:  15A36,  15A51 
@article{1102947957,
     author = {Levow, Roy B.},
     title = {Counterexamples to conjectures of Ryser and de Oliveira.},
     journal = {Pacific J. Math.},
     volume = {49},
     number = {2},
     year = {1973},
     pages = { 603-606},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1102947957}
}

Levow, Roy B. Counterexamples to conjectures of Ryser and de Oliveira.. Pacific J. Math., Tome 49 (1973) no. 2, pp.  603-606. http://gdmltest.u-ga.fr/item/1102947957/