@article{JRAM_1973__0262_0263_151377,
     author = {Hans Rohrbach},
     title = {The {Logogryph} of {Euler.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {392--399},
     publisher = {mathdoc},
     volume = {0262_0263},
     year = {1973},
     zbl = {0268.01006},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__0262_0263_151377/}
}