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2. Alvarez, F., Brime, C. &Curry, G.B. (1987): Growth and function of the micro-frills present on the Devonian brachiopodAthyris campomanesi (Verneuil & Archiac). — Trans. roy. Soc. Edinburgh,78: 65–72, 10 text-figs; Edinburgh.
3. Alverez, F. &Brunton, C.H.C. (1990):Pachyplax n. g. (Brachiopoda, Athyridacea) from the Lower Devonian of the Cantabrian Mountains, NW Spain. — Senckenbergiana lethaea,70 (1/3): 29–50, 24 text-figs, 5 tabs; Frankfurt am Main. — [1990a]
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