no. 3
Metrics in locally compact groups
Compositio Mathematica, Tome 28 (1974) no. 3, pp. 217-222. 
@article{CM_1974__28_3_217_0,
     author = {Struble, Raimond A.},
     title = {Metrics in locally compact groups},
     journal = {Compositio Mathematica},
     pages = {217--222},
     publisher = {Noordhoff International Publishing},
     volume = {28},
     number = {3},
     year = {1974},
     zbl = {0288.22010},
     mrnumber = {348037},
     language = {en},
     url = {www.numdam.org/item/CM_1974__28_3_217_0/}
}
Struble, Raimond A. Metrics in locally compact groups. Compositio Mathematica, Tome 28 (1974) no. 3, pp. 217-222. http://www.numdam.org/item/CM_1974__28_3_217_0/

[1] G. Birkhoff: A note on topological groups, Compositio Math., 3 (1936) 427-430. | JFM 62.0434.03 | Numdam | Zbl 0015.00702

[2] S. Kakutani: Über die Metrisation der topologischen Gruppen, Proc. Imp. Acad. Tokyo, 12 (1936) 82-84. | JFM 62.1230.03 | Zbl 0015.00701

[3] P. Halmos: Measure Theory, D. Van Nostrand, New York, 1950. | MR 33869 | Zbl 0040.16802

[4] E. Hewitt and K. Ross: Abstract Harmonic Analysis, Springer-Verlag, Berlin, 1963. | Zbl 0213.40103

[5] R. Struble: Almost periodic functions on locally compact groups, Proc. Nat. Acad. Sci., U.S.A., 39 (1953) 122-126. | MR 53948 | Zbl 0050.31003