1. Clack, J. A. in Amphibian Biology (eds Heatwole, H. & Carroll, R. L.) 979–1029 (Surrey Beatty, Chipping Norton, Australia, 2000)
2. Clack, J. A. & Carroll, R. L. in Amphibian Biology (eds Heatwole, H. & Carroll, R. L.) 1030–1043 (Surrey Beatty, Chipping Norton, Australia, 2000)
3. Coates, M. I. & Clack, J. A. in Studies on Early Vertebrates (eds Arsenault, M., Lelièvre, H. & Janvier, P.) 373–388 (Bulletin du Muséum National d'Histoire Naturelle, Paris, 1995)
4. Lombard, R. E. & Bolt, J. R. A new primitive tetrapod, Whatcheeria deltae, from the Lower Carboniferous of Iowa. Palaeontology 38, 471–494 (1995)
5. Bolt, J. R. & Lombard, R. E. in Amphibian Biology (eds Heatwole, H. & Carroll, R. L.) 1044–1052 (Surrey Beatty, Chipping Norton, Australia, 2000)