By Amrhein L.   Backes G.   in Zeitschrift für Gerontologie und Geriatrie

ISSN:0948-6704|40|2|104-111

Springer Publishing Company ‎(2007)‎

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By Backes G.   Wolfinger M.   in Zeitschrift für Gerontologie und Geriatrie

ISSN:0948-6704|41|3|153-155

Springer Publishing Company ‎(2008)‎

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By Lammerts van Bueren E.   Backes G.   Vriend H.   Østergård H.   in Euphytica

ISSN:0014-2336|175|1|51-64

Springer Publishing Company ‎(2010)‎

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