WASET
    Jukka Heinonen,  A Consumption-Based Hybrid Life Cycle Assessment of Carbon Footprints in California: High Footprints in Small Urban Households .   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 117(9). 953 - 960
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/10006196.