Geodesic
Asymptotic Estimates for the Approximation and Entropy Numbers of a One-Weight Riemann–Liouville Operator
Matematičeskie trudy, Tome 9 (2006) no. 1, pp. 52-100 Cet article a éte moissonné depuis la source Math-Net.Ru

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We obtain two-sided estimates for the asymptotic behavior of the approximation and entropy numbers of a one-weight Riemann–Liouville operator of an arbitrary integer order acting in Lebesgue spaces on the semiaxis. 
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E. N. Lomakina; V. D. Stepanov. Asymptotic Estimates for the Approximation and Entropy Numbers of a One-Weight Riemann–Liouville Operator. Matematičeskie trudy, Tome 9 (2006) no. 1, pp. 52-100. http://geodesic.mathdoc.fr/item/MT_2006_9_1_a3/

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