1. Alexander, R. R., 1981, Predation scars preserved in Chesterian brachiopods: probable culprits and evolutionary consequences for the articulates, J. Paleontol. 55:192–203.
2. Alexander, R. R., 1986a, Resistance to and repair of shell breakage induced by durophages in Late Ordovician brachiopods, J. Paleontol. 60:273–285.
3. Alexander, R. R., 1986b, Frequency of sublethal shell-breakage in articulates through geologic time, in: Les Brachiopodes Fossiles et Actuels (P. R. Racheboeuf and C. Emig, eds.), Université de Bretagne Occidentale. Biostratigraphie du Paleozoique, pp. 159–166.
4. Aronson, R. B., 1991, Escalating predation on crinoids in the Devonian: negative community-level evidence, Lethaia 24:123–128.
5. Ausich, W. I., and Gurrola, R. A., 1979, Two boring organisms in a Lower Mississippian community of southern Indiana, J. Paleontol. 53:335–344.