Neagu, T. (1970). Micropaleontological and stratigraphical study of the Upper Cretaceous deposits between the upper valleys of the Buzău and Rîul Negru rivers (Eastern Carpathians). Institut géologique.
Lua i Stíl Chicago (17ú heag.)Neagu, Theodor. Micropaleontological and Stratigraphical Study of the Upper Cretaceous Deposits Between the Upper Valleys of the Buzău and Rîul Negru Rivers (Eastern Carpathians). Bucarest: Institut géologique, 1970.
Lua MLA (8ú heag.)Neagu, Theodor. Micropaleontological and Stratigraphical Study of the Upper Cretaceous Deposits Between the Upper Valleys of the Buzău and Rîul Negru Rivers (Eastern Carpathians). Institut géologique, 1970.
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