@article{MS2_1976__38_166472,
     author = {Kenneth B. Gross},
     title = {A product theorem for {Skolem} sequences.},
     journal = {Mathematica Scandinavica},
     pages = {262--264},
     publisher = {mathdoc},
     volume = {38},
     year = {1976},
     zbl = {0364.05012},
     url = {http://geodesic.mathdoc.fr/item/MS2_1976__38_166472/}
}