§ 22. Das Additionstheorem
Lehrbuch der Algebra Bd. 3, GDML_Books, (1908), p. 76 / Harvested from
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     title = {\S\ 22. Das Additionstheorem},
     booktitle = {Lehrbuch der Algebra Bd. 3},
     series = {GDML\_Books},
     year = {1908},
     pages = {76},
     url = {http://dml.mathdoc.fr/item/PPN234736674+dmdlog32}
}

 (éd.). § 22. Das Additionstheorem, dans Lehrbuch der Algebra Bd. 3, GDML_Books,  (1908), p. 76. http://gdmltest.u-ga.fr/item/PPN234736674+dmdlog32/