WASET
    Long Van Hoang and  Mitsuyasu Yabe,  Impact of Environmental Factors on Profit Efficiency of Rice Production: A Study in Vietnam-s Red River Delta.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2012, vol. 66(6). 330 - 337
    [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/434.