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diff --git a/buch/papers/parzyl/references.bib b/buch/papers/parzyl/references.bib index 40be69a..390d5ed 100644 --- a/buch/papers/parzyl/references.bib +++ b/buch/papers/parzyl/references.bib @@ -56,4 +56,13 @@ timestamp = {2008-06-25T06:25:58.000+0200}, title = {Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables}, year = 1972 +} + +@online{parzyl:coordinates, + title = {Parabolic cylindrical coordinates}, + url = {https://en.wikipedia.org/wiki/Parabolic_cylindrical_coordinates}, + date = {2022-08-17}, + year = {2022}, + month = {8}, + day = {17} }
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