Freek Rhebergen & Botting, J. P. (2014). A new Silurian (Llandovery, Telychian) sponge assemblage from Gotland, Sweden. Wiley Blackwell.
Chicago-čujuhus (17. p.)Freek Rhebergen juo J. P. Botting. A New Silurian (Llandovery, Telychian) Sponge Assemblage from Gotland, Sweden. [Place of publication not identified]: Wiley Blackwell, 2014.
MLA-čujuhus (9. p.)Freek Rhebergen juo J. P. Botting. A New Silurian (Llandovery, Telychian) Sponge Assemblage from Gotland, Sweden. Wiley Blackwell, 2014.
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