1. A. Ya. Aleksandrov, M. Ya. Borodin, and V. V. Pavlov, Structures with Foam Plastic Fillers [in Russian], Mashinostroenie, Moscow (1972).
2. A. Ya. Aleksandrov and L. M. Kurshin, ?Multilayer plates and shells,? in: Proc. Seventh All-Union Confer. on Theory of Shells and Plates [in Russian], Nauka, Moscow (1970), pp. 714?721.
3. S. A. Ambartsymyan, Theory of Anisotropic Shells [in Russian], Nauka, Moscow (1961).
4. A. T. Vasilenko, ?Evaluation of some assumptions in theory of shells,? Dokl. Akad. Nauk UkrSSR, Ser. A, No. 4, 306?309 (1977).
5. É. I. Grigolyuk and F. A. Kogan, ?Present status of theory of multilayer shells,? Prikl. Mekh.,8, No. 6, 3?18 (1972).