There is no link on wikipedia to his work.
This is really a nice transform. There is coherent theory behind.
I am curious what motivated him to invent this transform.
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According to MacTutor,
He studied the transform which now bears his name and established its reciprocal properties. He applied this technique systematically in a long series of papers to the study of the gamma function, hypergeometric functions,...
and it gives this "long list of papers". I can't say much more because most of these papers are in Swedish. His first paper on Gamma function was published in 1883.
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$\begingroup$ I see even more papers in Finnish which would be even more difficult to read for most people familiar with "European" languages. According to Wikipedia, he was an outspoken fennoman. $\endgroup$ – Jeppe Stig Nielsen Apr 23 at 11:22
