Nouvelles chitinoidelles tithoniennes des Carpathes méridionales (Roumanie) Pop
Pop (1998): Nouvelles chitinoidelles tithoniennes des Carpathes méridionales (Roumanie) – C. R. Acad. Sci. Ser. II A Sci Terre Planetes – 326: 817 - 822.
Stratigraphic distribution and biozonation of Tithonian praecalpionellids and calpionellids from… Pop
Pop (1998): Stratigraphic distribution and biozonation of Tithonian praecalpionellids and calpionellids from the South Carpathians – Rom. J. Stratigraphy – 78: 1 - 24.
Systematic revision of the Tithonian chitinoidellids from the south Carpathians (Rumania) Pop
Pop (1997): Systematic revision of the Tithonian chitinoidellids from the south Carpathians (Rumania) – C. r. Acad. Sci. Ser. II A Sci. Terre Plantes – 324: 931 - 938.