Ubsdell 1979
Aus Offene Naturführer
Ubsdell, R. A. E. 1979: Studies on variation and evolution in Centaurium erythraea Rafn. and C. littorale (D. Turner) Gilmour in the British Isles. 3: Breeding systems, floral biology and general discussion. In: Watsonia. Bd. 12, S. 225–232.
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