Kiurski S. Jelena and  Kecić S. Vesna and  Oros B. Ivana,  Statistically Significant Differences of Carbon Dioxide and Carbon Monoxide Emission in Photocopying Process.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2016, vol. 111(3). 330 - 334
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10004048.