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 | 1992 | |
|---|---|---|
| 1 |      | Douglas Albert, Robert Baldinger, John Rhodes: Undecidability of the Identity Problem for Finite Semigroups. J. Symb. Log. 57(1): 179-192 (1992) |
| 1 | Douglas Albert | [1] |
| 2 | John L. Rhodes (John Rhodes) | [1] |