1. 1) CROLL J. G. A. Meridionally Imperfect Cooling Towers. Journal of the Engineering Mechanics Division, ASCE. ASCE. (1979) no.EM5, p.761-777.
2. 2) ELLINAS C. P. Cooling Towers with Circumferential Imperfections. Journal of the Structural Division, ASCE. (1980) no.ST12, p.2405-2423.
3. 3) GOULD P. L. Analysis of Hyperbolic Cooling Towers with Local Imperfections. Proc. Of the 2^<nd> Int'l Symp. IASS, Natural Draught Cooling Towers, 1984. Springer-Verlag. (1984)
4. 4) IASS Working Group No. 3. Recommendations for the Design of Hyperbolic or Other Similarly Shaped Cooling Towers. (1977)
5. 5) The Working Group on Recommendations of IASS. Recommendations for Reinforced Concrete Shells and Folded Plates. (1979)