KLUG, Christian; SCHWEIGERT, Günter; FUCHS, Dirk. First record of a belemnite preserved with beaks, arms and ink sac from the Nusplingen Lithographic Limestone (Kimmeridgian, SW Germany). Lethaia. 2010, roč. 43, čís. 4, s. 445–456. Dostupné online [cit. 2019-12-08]. ISSN1502-3931. DOI10.1111/j.1502-3931.2009.00203.x. (anglicky)
HOFFMANN, René; STEVENS, Kevin. The palaeobiology of belemnites – foundation for the interpretation of rostrum geochemistry. Biological Reviews. 2020-02, roč. 95, čís. 1, s. 94–123. Dostupné online [cit. 2023-10-16]. ISSN1464-7931. DOI10.1111/brv.12557. (anglicky)
KLUG, Christian; SCHWEIGERT, Günter; FUCHS, Dirk. First record of a belemnite preserved with beaks, arms and ink sac from the Nusplingen Lithographic Limestone (Kimmeridgian, SW Germany). Lethaia. 2010, roč. 43, čís. 4, s. 445–456. Dostupné online [cit. 2019-12-08]. ISSN1502-3931. DOI10.1111/j.1502-3931.2009.00203.x. (anglicky)
HOFFMANN, René; STEVENS, Kevin. The palaeobiology of belemnites – foundation for the interpretation of rostrum geochemistry. Biological Reviews. 2020-02, roč. 95, čís. 1, s. 94–123. Dostupné online [cit. 2023-10-16]. ISSN1464-7931. DOI10.1111/brv.12557. (anglicky)
worldcat.org
KLUG, Christian; SCHWEIGERT, Günter; FUCHS, Dirk. First record of a belemnite preserved with beaks, arms and ink sac from the Nusplingen Lithographic Limestone (Kimmeridgian, SW Germany). Lethaia. 2010, roč. 43, čís. 4, s. 445–456. Dostupné online [cit. 2019-12-08]. ISSN1502-3931. DOI10.1111/j.1502-3931.2009.00203.x. (anglicky)
HOFFMANN, René; STEVENS, Kevin. The palaeobiology of belemnites – foundation for the interpretation of rostrum geochemistry. Biological Reviews. 2020-02, roč. 95, čís. 1, s. 94–123. Dostupné online [cit. 2023-10-16]. ISSN1464-7931. DOI10.1111/brv.12557. (anglicky)