Ando Leppiman and  Kati Kõrbe Kaare and  Ott Koppel,  Future Outlook and Current Situation for Security of Gas Supply in Eastern Baltic Region.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 83(11). 2968 - 2975
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/9997286.