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1 Leech, Geoffrey, "Word Frequencies in Written and Spoken English" Pearson Education 2001
2 Crosswhite, Katherine, "Vowel Reduction in Optimality Theory" Routledge 2001
3 송지은, "Variable Schwa Deletion in English: A Corpus Study" 한국음운론학회 19 (19): 33-52, 2013
4 Glowacka, Dorota, "Unstressed Vowel Deletion and New Consonant Clusters in English" 37 : 71-94, 2001
5 Selkirk, Elizabeth, "The Role of Prosodic Categories in English Word Stress" 11 : 563-605, 1980
6 Fokes, Joann, "The Elusive/illusive Syllable" 50 : 102-123, 1993
7 Kahn, Daniel, "Syllable-Based Generalizations in English Phonology" MIT 1976
8 Bald, Wolf-Dietrich, "Studies in the Pronunciation of English" Routledge 317-322, 1990
9 Lodge, Ken, "Studies in the Phonology of Colloquial English" Croon Helm 1984
10 Zec, Draga, "Sonority Constraints on Syllable Structure" 12 : 85-29, 1995
11 류나영, "Schwa deletion in the conversational speech of English: The role of linguistic factors" 언어정보연구소 30 (30): 313-333, 2013
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32 Patterson, David, "Corpora Analyses of Frequency of Schwa Deletion in Conversational American English" 60 : 45-69, 2003
33 Pitt, Mark A., "Buckeye Corpus of Conversational Speech (2nd release)" Department of Psychology, Ohio State University 2007
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38 Ladefoged, Peter, "A Course in Phonetics" Wadsworth 2006