TY JOUR TI The Results of Studying Long Economic Waves in the Kingdom of Denmark Economy KW long term fluctuations KW trend analysis KW spectral analysis KW Kondratieffwaves KW cyclical component of the trend. JO Scientific Research and Development. Economics AU Averina, T.N. AU Levkina, N.N. PY 2015 IS 3 PB INFRA-M Academic Publishing LLC.