Journal article (2006) - G Katsaros (author) , A Rastelli (author) , M Stoffel (author) , G Costantini (author) , O Schmidt (author) , K Kern (author) , J Tersoff (author) , E Muller (author) , H von Kanel (author)

Report (2004) - O Schmidt (author) , M Maartens (author) , Wijnand W. Veeneman (author)