@article{Radtke2017,
author = {Radtke, Gregor and Keupp, Helmut},
year = {2017},
language = {eng},
copyright = {http://creativecommons.org/licenses/by/4.0/},
title = {The dorsal shell wall structure of Mesozoic ammonoids},
issn = {1732-2421},
issn = {0567-7920},
url = "http://dx.doi.org/10.17169/refubium-23637",
}