1. Relationships of the Palaearctic lizards assigned to the genera Lacerta, Algyroides and Psammodromus (Reptilia: Lacertidae);Arnold;Bulletin of the British Museum (Natural History), Zoology,1973
2. The reptiles and amphibians of Dhofar, Southern Arabia;Arnold;Journal of Oman Studies, Special Report No,1980
3. Estimating phylogenies at low taxonomic levels;Arnold;Zeitschrift für Zoologische Systematik und Evolutionsforschung,1981
4. Osteology, genitalia and the relationships of Acanthodaclylus (Reptilia: Lacertidae);Arnold;Bulletin of the British Museum (Natural History), Zoology,1983
5. The hemipenis of lacertid lizards (Reptilia: Lacertidae): structure, variation and systematic implications;Arnold;Journal of Natural History,1986