See my Sentences of Pseudo-Phocylides (Leiden: Brill, 1978), pp. 186–188, W. Bousset and H. Gressmann, Die Religion des Judentums im spathellenistischen Zeitalter (Tübingen: Mohr, 1926), pp. 322–323; Hengel, Judaism and Hellenism, vol. 1, pp. 196–197. For a balanced discussion, see now Michael E. Stone, Fourth Ezra (Minneapolis: Fortress Press, 1990), pp. 244–245 (ad 7:97).