548 citations · 2.7k across the 49 of their papers we have counts for
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math-ph2010★ 16 cited
"Sixth root of unity" and Feynman diagrams: hypergeometric function approach point of view
Mikhail Yu. Kalmykov, Bernd A. Kniehl
We briefly discuss the transcendental constants generated through the epsilon-expansion of generalized hypergeometric functions and their interrelation with the "sixth root of unit…
math-ph2010★ 12 cited
All-order epsilon-expansions of hypergeometric functions of one variable
Mikhail Yu. Kalmykov, Bernd A. Kniehl
We briefly sketch a proof concerning the structure of the all-order epsilon-expansions of generalized hypergeometric functions with special sets of parameters.