1. A. A. Nekrasov, ZhTF,10, no. 2, 1940.
2. G. N. Dul'nev and Z. V. Sigalova, Proc. 2nd All-Union Conference on Heat and Mass Transfer [in Russian], Minsk, 1964.
3. V. G. Dunskii and A. I. Tamarin, collection: Heat and Mass Transfer in Disperse Systems [in Russian], Minsk, 1965.
4. Tables of Associated Legendre Functions, Library of Mathematical Tables, no. 14, Computing Center AS USSR [in Russian], Moscow, 1962.
5. H. Carslaw and J. Jaeger, Conduction of Heat in Solids [Russian translation], Izd. Nauka, Moscow, 1964.