@ARTICLE{Klapper_Gilbert_Ontogenetic_2013, author={Klapper, Gilbert and Vodrážková, Stanislava}, volume={vol. 63}, number={No 2}, journal={Acta Geologica Polonica}, howpublished={online}, year={2013}, publisher={Komitet Nauk Geologicznych PAN}, publisher={Wydział Geologii UW}, title={Ontogenetic and intraspecific variation in the late Emsian – Eifelian (Devonian) conodonts Polygnathus serotinus and P. bultyncki in the Prague Basin (Czech Republic) and Nevada (western U.S.)}, URL={http://www.journals.pan.pl/Content/81904/PDF/01_klapper.pdf}, doi={10.2478/agp-2013-0006}, }