Não informado. (1969). International Journal for Numerical Methods in Engineering. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Não informado. International Journal for Numerical Methods in Engineering. Chichester, Inglaterra: John Wiley & Sons, 1969.
Lua MLA (8ú heag.)Não informado. International Journal for Numerical Methods in Engineering. John Wiley & Sons, 1969.
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