| Applied English syntax E Koffi Dubuque, IA: Kendall Hunt Publishing Company, 2010 | 81 | 2010 |
| Relevant acoustic phonetics of L2 English: Focus on intelligibility E Koffi CRC Press, 2021 | 60 | 2021 |
| Paradigm shift in language planning and policy: Game-theoretic solutions E Koffi Walter de Gruyter, 2012 | 55 | 2012 |
| The acoustic vowel space of central Minnesota English: Focus on female vowels E Koffi Linguistic Portfolios 2 (1), 2, 2013 | 24 | 2013 |
| A comprehensive review of intensity and its linguistic applications E Koffi Linguistic Portfolios 9 (1), 2, 2020 | 22 | 2020 |
| The acoustic correlates of [±ATR] vowels: An analysis by reference levels of Anyi vowels E Koffi Linguistic Portfolios 5 (1), 9, 2016 | 16 | 2016 |
| The representation of tones in the orthography EN Koffi Notes on Literacy 20 (3), 51-9, 1994 | 15 | 1994 |
| The pronunciation of<-ED> in coda clusters in Somali-accented English E Koffi Pronunciation in Second Language Learning and Teaching Proceedings 1 (1), 2009 | 12 | 2009 |
| A tutorial on formant-based speech synthesis for the documentation of critically endangered languages E Koffi, M Petzold Linguistic Portfolios 11 (1), 3, 2022 | 10 | 2022 |
| A Comprehenisve Review of the Acoustic Correlate of Duration and Its Linguistic Implications E Koffi Linguistic Portfolios 10 (1), 2, 2021 | 10 | 2021 |
| The acoustic vowel space of Central Minnesota English in light of the Northern cities shift EN Koffi Linguistic Portfolios 3 (1), 2, 2014 | 10 | 2014 |
| Intelligibility assessment and the acoustic vowel space: An instrumental phonetic account of the production of English lax vowels by Somali speakers E Koffi Pronunciation in Second Language Learning and Teaching Proceedings 3 (1), 2011 | 9 | 2011 |
| An acoustic phonetic account of the confusion between [l] and [n] by some Chinese speakers E Koffi Linguistic Portfolios 8 (1), 6, 2019 | 8 | 2019 |
| A Just Noticeable Difference (JND) reanalysis of Fry's original acoustic correlates of stress in American English E Koffi Linguistic Portfolios 7 (1), 2, 2018 | 8 | 2018 |
| The Lowering of high lax vowels in Central Minnesota English: Does it happen in other dialects E Koffi Linguistic Portfolios 5 (1), 2, 2016 | 8 | 2016 |
| The Pronunciation of Voiceless TH in Seven Varieties of L2 Englishes: Focus on Intelligibility E Koffi Linguistic Portfolios 4 (1), 2, 2015 | 8 | 2015 |
| Towards an optimal representation of tones in the orthographies of African languages EN Koffi Linguistic Portfolios 3 (1), 12, 2014 | 8 | 2014 |
| Designing optimal and supradialectal orthographies E Koffi West African Linguistics Society–WALS 25 July 31 to August 06, 2006. Cotonou …, 2006 | 8 | 2006 |
| A tutorial on acoustic phonetic feature extraction for automatic speech recognition (ASR) and text-to-speech (TTS) applications in African languages E Koffi Linguistic Portfolios 9 (1), 11, 2020 | 7 | 2020 |
| A longitudinal acoustic phonetic study of English vowels by a Panamanian speaker E Koffi, FG Lesniak Linguistic Portfolios 8 (1), 5, 2019 | 7 | 2019 |
