H. Zhang, M. Wang et X. Liu, «Constraints on the upper boundary age of the Tiaojishan Formation volcanic rocks in West Liaoning-North Hebei by LA-ICP-MS dating», Chinese Science Bulletin, vol.53, no22, , p.3574–3584 (DOI10.1007/s11434-008-0287-4, Bibcode2008SciBu..53.3574Z)
G. Schweigert, «Ammonite biostratigraphy as a tool for dating Upper Jurassic lithographic limestones from South Germany – first results and open questions», Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, vol.245, no1, , p.117–125 (DOI10.1127/0077-7749/2007/0245-0117, S2CID140597349, lire en ligne)
H. Zhang, M. Wang et X. Liu, «Constraints on the upper boundary age of the Tiaojishan Formation volcanic rocks in West Liaoning-North Hebei by LA-ICP-MS dating», Chinese Science Bulletin, vol.53, no22, , p.3574–3584 (DOI10.1007/s11434-008-0287-4, Bibcode2008SciBu..53.3574Z)
G. Schweigert, «Ammonite biostratigraphy as a tool for dating Upper Jurassic lithographic limestones from South Germany – first results and open questions», Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, vol.245, no1, , p.117–125 (DOI10.1127/0077-7749/2007/0245-0117, S2CID140597349, lire en ligne)
G. Schweigert, «Ammonite biostratigraphy as a tool for dating Upper Jurassic lithographic limestones from South Germany – first results and open questions», Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, vol.245, no1, , p.117–125 (DOI10.1127/0077-7749/2007/0245-0117, S2CID140597349, lire en ligne)