Wellman, C.H.; Lopes, G.; McKellar, Z.; Hartley, A. (2023). “Age of the basal ‘Lower Old Red Sandstone’ Stonehaven Group of Scotland: The oldest reported air-breathing land animal is Silurian (late Wenlock) in age”. Journal of the Geological Society (The Geological Society of London). doi:10.1144/jgs2023-138. hdl:2164/22754. ISSN0016-7649.
Wellman, C.H.; Lopes, G.; McKellar, Z.; Hartley, A. (2023). “Age of the basal ‘Lower Old Red Sandstone’ Stonehaven Group of Scotland: The oldest reported air-breathing land animal is Silurian (late Wenlock) in age”. Journal of the Geological Society (The Geological Society of London). doi:10.1144/jgs2023-138. hdl:2164/22754. ISSN0016-7649.
Wellman, C.H.; Lopes, G.; McKellar, Z.; Hartley, A. (2023). “Age of the basal ‘Lower Old Red Sandstone’ Stonehaven Group of Scotland: The oldest reported air-breathing land animal is Silurian (late Wenlock) in age”. Journal of the Geological Society (The Geological Society of London). doi:10.1144/jgs2023-138. hdl:2164/22754. ISSN0016-7649.