M. Feliciano and F. Maia and A. Gonçalves, An Analysis of Eco-efficiency and GHG Emission of Olive Oil Production in Northeast of Portugal. journal = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology. March 2014, vol. 88(4). 359 - 364 [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/9997989.