@article{MS2_1955__3_165567,
     author = {SIGURDUR HELGASON},
     title = {Some problems in the theory of almost periodic functions},
     journal = {Mathematica Scandinavica},
     pages = {49--67},
     publisher = {mathdoc},
     volume = {3},
     year = {1955},
     zbl = {0065.07104},
     url = {http://geodesic.mathdoc.fr/item/MS2_1955__3_165567/}
}