Frequency Analysis of The Vowels in Cantonese. - Eric Zee (ISCSLP, 2000)

An acoustical analysis of the vowels in beijing Mandarin. - Eric Zee; Wai-Sum Lee (INTERSPEECH, 2001)

Acoustic development of vowels in children's speech. - Wai-Sum Lee; Eric Zee (ISCSLP, 2010)

Developmental Change in F0 of Cantonese-Speaking Pre-adolescent Children. - Wai-Sum Lee; Eric Zee (ICPhS, 2011)

Spectral Analysis of Male and Female Vowels in Yongding Chinese. - Eric Zee; Wai-Sum Lee (ICPhS, 2011)