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@article{MS2_1955__3_165600, author = {THOGER BANG}, title = {Solution of problem 11 {(Vol.} 3 (1955), p. 171)}, journal = {Mathematica Scandinavica}, pages = {306--307}, publisher = {mathdoc}, volume = {3}, year = {1955}, url = {http://geodesic.mathdoc.fr/item/MS2_1955__3_165600/} }
THOGER BANG. Solution of problem 11 (Vol. 3 (1955), p. 171). Mathematica Scandinavica, Tome 3 (1955), pp. 306-307. http://geodesic.mathdoc.fr/item/MS2_1955__3_165600/