@article{ELMA_1972__27_141041,
     author = {K. Szymiczek},
     title = {Note on {Arithmetical} {Progressions} with {Equal} {Products} of {Five} {Terms.}},
     journal = {Elemente der Mathematik},
     pages = {11--12},
     publisher = {mathdoc},
     volume = {27},
     year = {1972},
     zbl = {0225.10011},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1972__27_141041/}
}