Degrees, neighbourhoods and closure operations. (English)
Acta Math. Univ. Comen., New Ser. 69, No.1, 71-76 (2000).
1
First-order definability on finite structures. (English)
Ann. Pure Appl. Logic 45, No.3, 211-225 (1989).
2
Conditional connectivity. (English)
Networks 13, 347-357 (1983).
3
Endliche Church-Rosser-Operatoren auf Graphen und ein Intervall- Algorithmus. (German)
Numerische Methoden bei graphentheoretischen und kombinatorischen Problemen, Bd. 2, Tag. Oberwolfach 1978, ISNM Vol. 46, 66-80 (1979).
4
Classification and specification of flat cluster methods. (English)
Math. Biosci. 41, 1-19 (1978).
5
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