@article{JRAM_1973__258_151280,
     author = {Rolf Wallisser},
     title = {\"Uber {Produkte} transzendenter {Zahlen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {62--78},
     year = {1973},
     volume = {258},
     zbl = {0257.10014},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__258_151280/}
}