Goddard, Cliff. The search for the shared semantic core of all languages. Cliff Goddard and Anna Wierzbicka (编). Meaning and Universal Grammar: Theory and Empirical Findings(PDF). Volume I. Amsterdam: John Benjamins. 2002: 5–40 [2012-07-31]. (原始内容(PDF)存档于2010-01-07).
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Goddard, Cliff. The search for the shared semantic core of all languages. Cliff Goddard and Anna Wierzbicka (编). Meaning and Universal Grammar: Theory and Empirical Findings(PDF). Volume I. Amsterdam: John Benjamins. 2002: 5–40 [2012-07-31]. (原始内容(PDF)存档于2010-01-07).