1. Ambartsumyan S. A. (1965). “The axisymmetric problem of circular cylindrical shell made of materials with different stiffness in tension and compression.” Izvestia Akademiya Nauk SSSR. Meckanika (4) 77–85;
2. English Translation (1967) NTIS Report FTD‐HT‐23‐1055‐67 Nat. Tech. Info. Service Springfield Va.
3. Ambartsumyan S. A. and Khachatryan A. A. (1966a). “Basic equations in the theory of elasticity for materials with different stiffness in tension and compression.” Inzhenernyi Zhurnal Mekhanika Tverdoga Tela (2) 44–53; Translation available from the Aerospace Corp. El Segundo Calif. as LRG‐67‐T‐12.