Voss, P.H., Gregersen. S., Dahl-Jensen, T. & Larsen, T.B. 10-31-2017.
Loydell, D.K., Walasek, N., Schovsbo, N.H. & Nielsen, A.T. 10-31-2017.
Graptolite biostratigraphy of the lower Silurian of the Sommerodde-1 core, Bornholm, Denmark.
Voss, P.H., Gregersen. S., Dahl-Jensen, T. & Larsen, T.B. 10-31-2017.
Loydell, D.K., Walasek, N., Schovsbo, N.H. & Nielsen, A.T. 10-31-2017.
Graptolite biostratigraphy of the lower Silurian of the Sommerodde-1 core, Bornholm, Denmark.