C.M. Berry, « A reconsideration of Wattieza Stockmans (here attributed to Cladoxylopsida) based on a new species from the Devonian of Venezuela », Review of Palaeobotany and Palynology, vol. 112, nos 1–3, , p. 125–146 (ISSN0034-6667, PMID11042329, DOI10.1016/s0034-6667(00)00038-5)
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C.M. Berry, « A reconsideration of Wattieza Stockmans (here attributed to Cladoxylopsida) based on a new species from the Devonian of Venezuela », Review of Palaeobotany and Palynology, vol. 112, nos 1–3, , p. 125–146 (ISSN0034-6667, PMID11042329, DOI10.1016/s0034-6667(00)00038-5)
C.M. Berry, « A reconsideration of Wattieza Stockmans (here attributed to Cladoxylopsida) based on a new species from the Devonian of Venezuela », Review of Palaeobotany and Palynology, vol. 112, nos 1–3, , p. 125–146 (ISSN0034-6667, PMID11042329, DOI10.1016/s0034-6667(00)00038-5)
Chris Berry, « The Middle Devonian plant collections of Francois Stockmans reconsidered. », Geologica Belgica, vol. 12, nos 1–2, , p. 25–30 (lire en ligne)