1. Borri C., Zahlten W., Nonlinear static and dynamic analysis of cooling tower shells, Proc. 10th (Ital.) Nat. Cong. on Theor. and Appl. Mechanics, A.I.Me.T.A., Pisa, (1990), I 244–250
2. Borri C., Bartoli G., Zahlten W., Dinamica non lineare di torri refrigeranti soggette all’azione del vento, 1st Ital. Nat. Conf. on Wind Engrg., IN-VENTO-90, G. Augusti/C. Borri/P. Spinelli Eds., Firenze, (1990)
3. Basar Y., Zur Struktur konsistenter inkrementeller Theorien für geometrisch nichtlineare Flächentragwerke und deren Operatordarstellung, Ingenieurarchiv, Vol. 56, (1986) 209–220
4. Bazant Z.P., Kim S.-S., Plastic-Fracturing Theory for Concrete, Journ. of Eng. Mech. Div., Proc. ASCE, Vol. 105, (1979) 407–428
5. Zahlten W., A Contribution to the Physically and Geometrically Nonlinear Computer Analysis of General Reinforced Concrete Shells, Techn. Rept. 1990–2, Dept. of Struct. Engrg., Univ. Bochum, (1990)