Geodesic
Interpolation of Rational Approximation Spaces Belonging to the Besov Class
Matematičeskie zametki, Tome 77 (2005) no. 6, pp. 877-885.

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The Peetre real interpolation method is realized for the Besov class of spaces of analytic functions on the circle. We obtain a description of interpolation norms with the help of difference-differential constructions. We consider rational approximation spaces in the $BMOA$ and $H_p$ norms. 
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V. L. Kreptogorskii. Interpolation of Rational Approximation Spaces Belonging to the Besov Class. Matematičeskie zametki, Tome 77 (2005) no. 6, pp. 877-885. http://geodesic.mathdoc.fr/item/MZM_2005_77_6_a6/

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