FO gives voicing information even with unambiguous voice onset times.
Whalen D, Abramson A, Lisker L, Mody M. FO gives voicing information even with unambiguous voice onset times. The Journal Of The Acoustical Society Of America 1993, 93: 2152-9. PMID: 8473630, DOI: 10.1121/1.406678.Peer-Reviewed Original Research