WASET
    V. Sulakatko and  F. U. Vogdt and  I. Lill,  A Concept to Assess the Economic Importance of the On-Site Activities of ETICS.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2017, vol. 124(4). 518 - 522
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10007384.