Wold, H. (1981). The Fix-Point Approach to Interdependent Systems. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Wold, H. The Fix-Point Approach to Interdependent Systems. ELSEVIER, 1981.
Lua MLA (8ú heag.)Wold, H. The Fix-Point Approach to Interdependent Systems. ELSEVIER, 1981.
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