1
Published: 2001
Superior document: Supplemento ai Rendiconti del Circolo Matematico di Palermo Ser. 2,67
2
Published: 1988.
Superior document: Annals of discrete mathematics ; 37
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3
Published: [2019]
Superior document: Title is part of eBook package: De Gruyter University of Toronto Press eBook-Package Archive 1933-1999
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