The tonal component of Estonian quantity in native and non-native perception. - Pärtel Lippus; Karl Pajusalu; Jüri Allik (J. Phonetics, 2009)

Has Estonian Quantity System Changed in a Century? Comparison of Historical and Contemporary Data. - Pärtel Lippus; Jaan Ross (ICPhS, 2011)

Quantity-related variation of duration, pitch and vowel quality in spontaneous Estonian. - Pärtel Lippus; Eva Liina Asu; Pire Teras; Tuuli Tuisk (J. Phonetics, 2013)

Segmental context effects on temporal realization of Estonian quantity. - Pärtel Lippus; Juraj Simko (ICPhS, 2015)

Pitch, perceived duration and auditory biases: Comparison among languages. - Juraj Simko; Daniel Aalto; Martti Vainio; Pärtel Lippus; Marcin Wlodarczak (ICPhS, 2015)

Temporal patterns of quantity in Inari Saami. - Helen Türk; Pärtel Lippus; Karl Pajusalu; Pire Teras (ICPhS, 2015)

Creak as a Feature of Lexical Stress in Estonian. - Kätlin Aare; Pärtel Lippus; Juraj Simko (INTERSPEECH, 2017)

Creak in the Respiratory Cycle. - Kätlin Aare; Pärtel Lippus; Marcin Wlodarczak; Mattias Heldner (INTERSPEECH, 2018)

The acoustic correlates of quantity in Inari Saami. - Helen Türk; Pärtel Lippus; Karl Pajusalu; Pire Teras (J. Phonetics, 2019)