1. V. V. Bolotin and Yu. N. Novichkov, Mechanics of Multilayer Structures [in Russian], Izd. Mashinostroenie, Moscow (1980).
2. É. I. Grigolyuk and F. A. Kogan, ?Present status of theory of multilayer shells,? Prill. Mekh.,8, No. 5, 5?17 (1972).
3. É. I. Grigolyuk and P. P. Chulkov, ?Stability and vibrations of triple-layer shells,? Nauch. Trudy Inst. Mekh. Mosk. Gos. Univ., No. 27, 3 (1973).
4. A. N. Guz', Stability of Three-Dimensional Deformable Bodies [in Russian], Naukova Dumka, Kiev (1971).
5. A. N. Guz' and I. Yu. Babich, Three-Dimensional Theory of Stability for Beams, Plates, and Shells [in Russian], Visha Shkola, Kiev (1980).