%0 Journal Article %A Garofalo, Nicola %A Lanconelli, Ermanno %T Frequency functions on the Heisenberg group, the uncertainty principle and unique continuation %J Annales de l'Institut Fourier %D 1990 %P 313-356 %V 40 %N 2 %I Institut Fourier %C Grenoble %U https://aif.centre-mersenne.org/articles/10.5802/aif.1215/ %R 10.5802/aif.1215 %G en %F AIF_1990__40_2_313_0