STEPHAN, Bruno Richard. Beech and oak species in Germany: occurence and gene conservation measures. In First EUFORGEN Meeting on Social Broadleaves, 1998, s. 102-111Error: read handle in (rep.epca.fmtISO690).fmtXDatabaze. Dostupné na internete: <https://scholar.google.sk/scholar?hl=sk&as_sdt=0%2C5&q=Beech+and+oak+species+in+Germany%3A+occurence+and+gene+conservation+measures&btnG=>