@article {734,
	title = {[Preliminary contribution to the subspecies problem in <i>Vipera lebetina </i>(Serpentes Viperidae).] (in German)},
	journal = {Salamandra},
	volume = {20},
	number = {2-3},
	year = {1984},
	pages = {65-69},
	keywords = {Reptilia},
	author = {Billing, H. and Schaetti, B.}
}
