Bjørklund, K.R.; Goll, R.M. (1979). Internal skeletal structures of Collosphaera and Trisolenia: a case of repetitive evolution in the Collosphaeridae (Radiolaria). Journal of Paleontology. 1293-1326.
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Bjørklund, K.R.; Goll, R.M.
1979
Internal skeletal structures of Collosphaera and Trisolenia: a case of repetitive evolution in the Collosphaeridae (Radiolaria).