Dr.Karen Rieck
fileadmin/content/abteilungen/developing-countries/dokumente/downloads/international-class/the-transport-sector-in-rousay-and-eday-energy-cost-and-emissions-compared-to-kirkwall-2010-.pdf
.ipcc- nggip.iges.or.jp/public/2006gl/pdf/2_Volume2/V2_3_Ch3_Mobile_Combustion.pdf [17.03.2010] • Kåre Senneset et al, Strait Crossings 2009, Trondheim, Norway xiii • Local Transport Strategy 2007-2010