APA

Sivhed U., Erlstrom M., Bojesen-KOefoed J., Erlstrom M. & Bojesen-Koefoed J.Upper Ordovician carbonate mounds on Gotland, Central Baltic Sea. : .

Chicago

Sivhed U, Erlstrom M, Bojesen-KOefoed J.A, Erlstrom M and Bojesen-Koefoed J.A.Upper Ordovician carbonate mounds on Gotland, Central Baltic Sea. : .

Harvard

Sivhed U., Erlstrom M., Bojesen-KOefoed J., Erlstrom M. and Bojesen-Koefoed J.Upper Ordovician carbonate mounds on Gotland, Central Baltic Sea. : .

MLA

Sivhed U, Erlstrom M, Bojesen-KOefoed J.A, Erlstrom M and Bojesen-Koefoed J.A.: . .