Micropaleontological and stratigraphical study of the upper cretaceous deposits between the upper valleys of the buzău and rîul negru rivers (eastern carpathians) - Neagu, Theodor (1970)
[Nebent.:] Neagu: Studiul micropaleontologic si stratigrafic al depozitelor Cretacicului superior intre valea Buzaului si Riul Negru (Carpatii orientali)