select * from arkL_refs as r left join arkL_reflinks as l on r.refno=l.refno where (l.dbase='arkL_datasets' and l.dbase_id=81) order by abv_ref, disambig

Becker, R. T., Gradstein, F. M. & Hammer, O. (2012). The Devonian Period. In, Gradstein, F. M. , Ogg, J. G. , Schmitz, M. D. , and Ogg, G. M. (ed.) The Geologic Time Scale 2012. Amsterdam: Elsevier Press 2: 559-601. gs

Goldman, D., Sadler, P. M. & Leslie, S. A. (2020). Chapter 20 - The Ordovician Period. In, Gradstein, F. M. , Ogg, J. G. , Schmitz, M. D. , and Ogg, G. M. (ed.) The Geologic Time Scale 2020. Elsevier, Boston, MA 2: 631-694. gs

Kozur, H. W. (2003). Integrated ammonoid, conodont and radiolarian zonation of the Triassic. Hallesches Jahrbuch für Geowissenschaften. B25: 49-79. gs

Orchard, M. J. & Tozer, E. T. (1997). Triassic conodont biochronology, its intercalibration with the ammonoid standard, and a biostratigraphic summary for the Western Canada Sedimentary Basin. Bulletin of Canadian Petroleum Geology. 45: 675-692. gs

Orchard, M. J. (2007b). Conodont diversity and evolution through the latest Permian and Early Triassic upheavals. Palaeogeography Palaeoclimatology Palaeoecology. 252: 93-117. gs

Orchard, M. J. (2010). Triassic conodonts and their role in stage boundary definitions. In, Lucas, S. G. (ed.) The Triassic Timescale. Geological Society of London, Special Publications . 334: 139-161. gs

Peng, S. C., Babcock, L. E. & Ahlberg, P. (2020c). Chapter 19 - The Cambrian Period. In, Gradstein, F. M. , Ogg, J. G. , Schmitz, M. D. , and Ogg, G. M. (ed.) The Geologic Time Scale 2020. Elsevier, Boston, MA 2: 565-630. gs

Rigo, M., et al. (2018). New Upper Triassic conodont biozonation of the Tethyan Realm. In, Tanner, L. H. (ed.) The Late Triassic World: Earth in a Time of Transition. Topics in Geobiology . 46: 189-235. gs

Webby, B. D., et al. (2004a). Stratigraphic framework and time slices. In, Webby, B. D. , Paris, F. , Droser, M. L. , and Percival, I. G. (ed.) The Great Ordovician Biodiversification Event. New York: Columbia University Press 41-47. gs