Wallerstein, D. V. (2002). A variational approach to structural analysis. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Wallerstein, David V. A Variational Approach to Structural Analysis. New York, NY: John Wiley & Sons, 2002.
Lua MLA (8ú heag.)Wallerstein, David V. A Variational Approach to Structural Analysis. John Wiley & Sons, 2002.
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