| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Development of Modality in First Language Acquisition: A Cross-linguistic Perspective | 978-1-5015-1245-2 (1-5015-1245-5) | 2021 | Ursula Stephany · Ayhan Aksu-koç | |
| The Acquisition of Number and Case from a Typological Perspective | 978-3-11-018840-0 (3-11-018840-6) | 2008 | Ursula Stephany |