Cited by CrossRef (4)
- Michael G. Bassett, Ellis L. Yochelson. Charles D. Walcott in England and Wales (1888): A crucial visit in the resolution of Taconic-Cambrian-Ordovician questions. Proceedings of the Geologists' Association 2004;115:63

- D. Goldman, P.M. Sadler, S.A. Leslie, M.J. Melchin, F.P. Agterberg, F.M. Gradstein. Geologic Time Scale 2020. 2004.

- H.L. James. Reflections on problems of time subdivision and correlation. Precambrian Research 1981;15:191

- David A. T. Harper, Tõnu Meidla, Thomas Servais. A short history of the Ordovician System: from overlapping unit stratotypes to global stratotype sections and points. SP 2023;532:13
