@article{PPN234736674+dmdlog187, title = {\S\ 153. Die Funktion t(u)}, booktitle = {Lehrbuch der Algebra Bd. 3}, series = {GDML\_Books}, year = {1908}, pages = {571}, url = {http://dml.mathdoc.fr/item/PPN234736674+dmdlog187} }
(éd.). § 153. Die Funktion t(u), dans Lehrbuch der Algebra Bd. 3, GDML_Books, (1908), p. 571. http://gdmltest.u-ga.fr/item/PPN234736674+dmdlog187/