1. The position of the Ordovician–Silurian boundary in Estonia tested by high-resolution δ13C chemostratigraphic correlation;Ainsaar,2015
2. Graptolites and trilobites from the Eusebio Ayala Formation (Hirnantian?–early Llandovery), Paraná Basin, eastern Paraguay;Alfaro;Geol. J.,2013
3. Late Ordovician (post–Sardic) rifting branches in the North Gondwanan Montagne Noire and Mouthoumet massifs of southern France;Álvaro;Tectonophysics,2016
4. Late Ordovician and Early Silurian articulate brachiopods from Oklahoma, southwestern Illinois, and eastern Missouri;Amsden;Okla. Geol. Surv., Bull.,1974
5. Late Ordovician-Early Silurian strata in the Central United States and the Hirnantian Stage;Amsden;Okla. Geol. Surv., Bull.,1986