Voicing and aspiration in Swedish stops. - Pétur Helgason; Catherine Ringen (J. Phonetics, 2008)

Rate effects on Swedish VOT: Evidence for phonological overspecification. - Jill Beckman; Pétur Helgason; Bob McMurray; Catherine Ringen (J. Phonetics, 2011)

The voicing contrast in Fenno-Swedish stops. - Catherine Ringen; Kari Suomi (J. Phonetics, 2012)

Swedish quantity: Central Standard Swedish and Fenno-Swedish. - Pétur Helgason; Catherine Ringen; Kari Suomi (J. Phonetics, 2013)

Quantity and laryngeal contrasts in Norwegian. - Catherine Ringen; Wim A. van Dommelen (J. Phonetics, 2013)