- Barag, Dan. “Glass Pilgrim Vessels from Jerusalem: Part 1.” Journal of Glass Studies 12 (1970): 35–63. Barag gives a description of all the surviving flasks with Jewish and Christian symbols, interprets their shape, and suggests they were used in pilgrim rituals.
- Friedman, Mark. “Jewish Pilgrimage after the Destruction of the Second Temple.” Pages 136–46 in City of the Great King: Jerusalem from David to the Present. Edited by Nitza Rosovsky. Cambridge, Mass.: Harvard University Press, 1996. An overview of literary sources for Jewish pilgrimage from 70 to 1517.
- Wilken, Robert L. “Christian Pilgrimage to the Holy Land.” Pages 117–35 in City of the Great King: Jerusalem from David to the Present. Edited by Nitza Rosovsky. Cambridge, Mass.: Harvard University Press, 1996. An introduction to the idea and the history of pilgrimage.
- Wilkinson, John. Jerusalem Pilgrims before the Crusades. 2nd ed. Warminster: Aris & Phillips, 2002, 129–51 (or pp. 79–89 in the 1977 edition). A translation of the travel journal of Antoninus of Piacenza’s companion, who visited Jerusalem around 570, giving a detailed description of the use of pilgrim flasks.
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