Other published works are: Observationes criticae ad Vetus Testamentum (1836); Ueber das Vocalsystem der hebraeischen Sprache nach der sogenannten assyrischen Punktuation (1865); and Beitraege zur Kritik des ueberlieferten Textes im Buche Genesis (1870). His critical method is explained in the second edition of Hirzel's commentary on Job which Olshausen edited (1852), and in his commentary on Psalms (1853), where he stated that most of the psalms were composed in the Maccabean period; this assertion was sharply criticized. His Zur Topographie des alten Jerusalem (1833) has been superseded by later discoveries; but Ueber den Ursprung des Alphabetes und ueber die Vocalbezeichnung im Alten Testamente (1841), a study on the origin of the Hebrew alphabet and its vocalization, is still important. Lehrbuch der Hebraeischen Sprache (1861) is probably his major work. It is a Hebrew grammar; the third volume, devoted to Hebrew syntax, was, however, not published.