@misc{kirchhoff_2018_1423666, author = {Kirchhoff, G.}, title = {Ueber die Fraunhofer'schen Linien}, month = sep, year = 2018, publisher = {Zenodo}, doi = {10.1002/andp.18601850115}, url = {https://doi.org/10.1002/andp.18601850115} }