Pignatti, J. S.; Ventura, G. (1993). The types of Nummulites and Operculina of the Tellini (1890) collection stored at the museum of Paleontology at "La Sapienza" University of Rome. University of Rome. Geologica Romana. 29: 131-138.
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Pignatti, J. S.; Ventura, G.
1993
The types of Nummulites and Operculina of the Tellini (1890) collection stored at the museum of Paleontology at "La Sapienza" University of Rome.