See the enactments attributed to Rabban Yohanan Ben Zakkai in Mishnah Rosh Hashanah 4:1, 3, 4; Gedaliah Alon, The Jews in Their Land in the Talmudic Age, Vol. 1 (Jerusalem: Magness, 1980), especially pp. 107–118, 253–86; Isaac Gilat, R. Eliezer ben Hyrcanus (Ramat Gan: Bar-Ilan University, 1984), passim, e.g., pp. 12, 313–317, 447–450; E. E. Urbach, The Sages, 2nd English ed. (Jerusalem: Magness, 1979), pp. 432–434; and Louis Finkelstein, “Additional Teachings of R. Nehunya ben HaQana” (in Hebrew), Tarbiz 50 (1980–1981), p. 93.