@article {MR0158022,
    AUTHOR = {Alfsen, E. M.},
     TITLE = {A simplified constructive proof of the existence and
              uniqueness of {H}aar measure},
   JOURNAL = {Math. Scand.},
  FJOURNAL = {Mathematica Scandinavica},
    VOLUME = {12},
      YEAR = {1963},
     PAGES = {106--116},
      ISSN = {0025-5521,1903-1807},
   MRCLASS = {28.75},
  MRNUMBER = {158022},
MRREVIEWER = {F.\ Hahn},
       DOI = {10.7146/math.scand.a-10675},
       URL = {https://doi.org/10.7146/math.scand.a-10675},
}
@article {MR0369664,
    AUTHOR = {Nakanishi, Shizu},
     TITLE = {On the existence proof of {H}aar measure},
   JOURNAL = {Proc. Japan Acad.},
  FJOURNAL = {Proceedings of the Japan Academy},
    VOLUME = {50},
      YEAR = {1974},
     PAGES = {789--792},
      ISSN = {0021-4280},
   MRCLASS = {28A70},
  MRNUMBER = {369664},
MRREVIEWER = {Edwin\ Hewitt},
       URL = {http://projecteuclid.org/euclid.pja/1195518748},
}