Mapping innovation in the European transport sector, EC Joint Research Centre, EUR 24771 EN, 2011 (http://publications.jrc.ec.europa.eu/repository/bitstream/111111111/26129/1/lfna24771enn.pdf ).
Mapping innovation in the European transport sector, Euroopa Komisjoni Teadusuuringute Ühiskeskus, EUR 24771 EN, 2011 (http://publications.jrc.ec.europa.eu/repository/bitstream/111111111/26129/1/lfna24771enn.pdf ).