Formant transformation from male to female synthetic voices. - Marianne Elmlund; Ida Frehr; Niels Reinholt Petersen (ICSLP, 1992)

Improving the spectral balance of digital speech synthesis applied to a female, synthetic voice. - Ida Frehr; Marianne Elmlund; Henrik Nielsen (EUROSPEECH, 1993)

Preserving naturalness in synthetic voices while minimizing variation in formant frequencies and bandwidths. - Niels-Jørn Dyhr; Marianne Elmlund; Carsten Henriksen (ICSLP, 1994)