HelsingforsContenus (2 total)

mittag-leffler1.pdf
1881-01-04;
http://henripoincarepapers.univ-lorraine.fr/chp/text/mittag-leffler1.html

mittag-leffler2.pdf
1881-05-22;
http://henripoincarepapers.univ-lorraine.fr/chp/text/mittag-leffler2.html
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