| |
| 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) | |