| title | ISBN-13 | year of publication |
|---|
| A Syriac Lectionary from the Church of the Forty Martyrs in Mardin, Tur 'Abdin, Mesopotamia. Subs. 76. | 978-90-429-0526-9 | 1986 |
| Handschriftliche Uberlieferung der Memre-Dichtung des Ja'qob von Serug. III. Subs. 60. | 978-90-429-0462-0 | 1980 |
| Handschriftliche Uberlieferung der Memre-Dichtung des Ja'qob von Serug, II. Sammlungen: Der Bestand. Subs. 40. | 978-90-429-0386-9 | 1973 |
| Handschriftliche Uberlieferung der Memre-Dichtung des Ja'qob von Serug, I. Sammlungen: Die Handschriften. Subs. 39. | 978-90-429-0385-2 | 1973 |
| Handschriftliche Uberlieferung der Memre-Dichtung des Ja'qob von Serug. IV. Subs. 61. | 978-90-429-0463-7 | 1980 |
| History of Asceticism in the Syrian Orient. A Contribution to the History of Culture in the Near East, I. The Origin of Asceticism. Early Monasticism ... | 978-90-429-0218-3 | 1958 |
| Studies in the History of the Gospel Text in Syriac. Subs. 3. | 978-90-429-0162-9 | 1951 |
| Studies in the History of the Gospel Text in Syriac. Subs. 79. | 978-90-429-0537-5 | 1987 |
| The Apocalypse in the Harklean Version. A Facsimile Edition of Ms. Mardin Orth. 35, fol. 143r-159v, with an Introduction. Subs. 56. | 978-90-429-0441-5 | 1978 |
| The Didascalia Apostolorum in Syriac, II. Syr. 179. | 978-90-429-0448-4 | 1979 |
| The Didascalia Apostolorum in Syriac, II. Syr. 180. | 978-90-429-0449-1 | 1979 |
| The Didascalia Apostolorum in Syriac, I. Syr. 175. | 978-90-429-0442-2 | 1979 |
| The Didascalia Apostolorum in Syriac, I. Syr. 176. | 978-90-429-0443-9 | 1979 |
| The Synodicon in the West Syrian Tradition, II. Syr. 163. | 978-90-429-0416-3 | 1976 |
| The Synodicon in the West Syrian Tradition, II. Syr. 164. | 978-90-429-0417-0 | 1976 |
| The Synodicon in the West Syrian Tradition, I. Syr. 161. | 978-90-429-0408-8 | 1975 |
| The Synodicon in the West Syrian Tradition, I. Syr. 162. | 978-90-429-0409-5 | 1975 |