| No. | Title | Author | Year |
|---|---|---|---|
| 1 | An effective characterization of the alternation hierarchy in two-variable logic | Krebs, Andreas et al. | 2012 |
| 2 | Algebraic Characterization of the Alternation Hierarchy in FO^2[<] on Finite Words | Straubing, Howard | 2011 |
| Number of result pages: | 1 |
| Number of documents: | 2 |
