%0 Journal Article %T Ecological Indicators of the Perkins 1104D-E44TA Engine After Its Adaptation for Being Powered with Natural Gas and Diesel Fuel %A Kurczyński, Dariusz %A Łagowski, Piotr %A Warianek, Michał %J Journal of KONES %V 24 %N 3 %P 143-150 %D 2017-09-01 %I Sciendo %~ DeepDyve