- CSB - MetaPress - Google - Bing - Yahoo
 | 1991 | |
|---|---|---|
| 4 |      | Uschi Heuter: First-order properties of trees, star-free expressions, and aperiodicity. ITA 25: 125-146 (1991) |
| 1989 | ||
| 3 |  | Uschi Heuter: Generalized Definite Tree Languages. MFCS 1989: 270-280 |
| 1988 | ||
| 2 | | Uschi Heuter: First-Order Properties of Trees, Star-Free Expressions, adn Aperiodicity. STACS 1988: 136-148 |
| 1 | | Uschi Heuter: Definite tree languages. Bulletin of the EATCS 35: 137-142 (1988) |