An estimate for the difference of spectral functions of Gegenbauer-type operators in the norm of $L_q$
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1999), pp. 20-25.

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V. V. Dubrovskii; A. I. Sedov. An estimate for the difference of spectral functions of Gegenbauer-type operators in the norm of $L_q$. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1999), pp. 20-25. http://geodesic.mathdoc.fr/item/IVM_1999_8_a2/

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