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1991 | ||
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2 | W. Herfort, H. Penz: A New Notion of Reduction: General Universal Gröbner Basis for K[x, y]. J. Symb. Comput. 12(6): 585-606 (1991) | |
1984 | ||
1 | W. Herfort, Werner Kuich: Semitopological Semirings and Pushdown Automata. Mathematical Systems Theory 17(4): 279-291 (1984) |
1 | Werner Kuich | [1] |
2 | H. Penz | [2] |