Dikova, P. (1967). New foraminifera species from the Tortonian and the Sarmatian in northwestern Bulgaria. Списание на Българското геологическо дружество - Review of the Bulgarian Geological Society. 28(3): 303-318.
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Dikova, P.
1967
New foraminifera species from the Tortonian and the Sarmatian in northwestern Bulgaria
Списание на Българското геологическо дружество - Review of the Bulgarian Geological Society