Stancheva, M. (1971). Hemicytheria (Getocytheria) subgen.n. and its representatives in North-Western Bulgaria. Bull.Geol.Inst.Bulg.Acad.Sci.(Paleont.). 20: 45-62.
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Stancheva, M
1971
Hemicytheria (Getocytheria) subgen.n. and its representatives in North-Western Bulgaria