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ACTA MATHEMATICA HUNGARICA, 164 (1)., pp. 46-50. ISSN 0236-5294
ACTA MATHEMATICA HUNGARICA, 140 (3)., pp. 243-247. ISSN 0236-5294
COMBINATORICA, 32 (5)., pp. 589-605. ISSN 0209-9683
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 140 (3)., pp. 971-975. ISSN 0002-9939
American Mathematical Monthly, 118 (10)., pp. 877-886.
AMERICAN MATHEMATICAL MONTHLY, 118 (10)., pp. 877-886. ISSN 0002-9890
Annales Universitatis Scientiarum Budapestinensis de Rolando Eötvös Nominatae. Sectio Mathematica, 54, pp. 53-57.
Publicationes Mathematicae - Debrecen, 79 (3-4)., pp. 507-519.