Trifonova, E. (1965). Nodosaria ordinata, sp. nov. ot gornijatrias v Bulgarja (Nodosaria ordinata, sp. nov. from the mountainous Triassic of Bulgaria). Списание на Българското геологическо дружество - Review of the Bulgarian Geological Society. 26: 213–216 (in Bulgarian).
389838
Trifonova, E.
1965
Nodosaria ordinata, sp. nov. ot gornijatrias v Bulgarja (Nodosaria ordinata, sp. nov. from the mountainous Triassic of Bulgaria).
Списание на Българското геологическо дружество - Review of the Bulgarian Geological Society