Rankka et al., 2004. Rankka, Karin;Andersson-Sköld, Yvonne;Hultén, Carina;Larsson, Rolf;Leroux, Virginie.«Quick clay in Sweden».Report No. 65. Swedish Geotechnical Institute,2004. Arxivat de l'original el 2005-04-04.[Consulta: 20 abril 2005].
Rankka et al., 2004. Rankka, Karin;Andersson-Sköld, Yvonne;Hultén, Carina;Larsson, Rolf;Leroux, Virginie.«Quick clay in Sweden».Report No. 65. Swedish Geotechnical Institute,2004. Arxivat de l'original el 2005-04-04.[Consulta: 20 abril 2005].