@book {149, title = {The Amphibians of the Former Soviet Union}, year = {1999}, publisher = {Pensoft}, organization = {Pensoft}, address = {Moscow}, author = {Kuzmin, S.L.} } @article {172, title = {Der Sibirische Froschzahnmolch Ranodon sibiricus. Vom Aussterben bedroht?}, journal = {Reptilia}, volume = {19}, year = {1999}, pages = {60-64}, author = {Greven, H. and Kuzmin, S.L. and Thiesmeier, B.} }