Conodonts: a sister group to hagfish?
Aldridge, R. J. and Donoghue, P. C. J.
In J. M. Jørgensen, J. P. Lomholt, R. E. Weber and H. Malte (ed.). The Biology of Hagfishes. Chapman and Hall, London. pp. 15-31 (1998)

Growth and patterning in the conodont skeleton
Donoghue, P. C. J.
Philosophical Transactions of the Royal Society of London, Series B 353: 633-666 (1998)

Conodont anatomy, chordate phylogeny and vertebrate classification
Donoghue, P. C. J., Purnell, M. A. and Aldridge, R. J.
Lethaia 31: 211-219 (1998)

Architecture and functional morphology of the skeletal apparatus of ozarkodinid conodonts
Purnell, M. A. and Donoghue, P. C. J.
Palaeontology 41: 57-102 (1998)