@article{BNYMS_1893__2_186506,
     author = {Irving Stringham},
     title = {Note on the {Definitions} of {Logarithm} and {Exponential.}},
     journal = {Bulletin of the New York Mathematical Society},
     pages = {168--170},
     publisher = {mathdoc},
     volume = {2},
     year = {1893},
     zbl = {25.0739.01},
     url = {http://geodesic.mathdoc.fr/item/BNYMS_1893__2_186506/}
}