Role of Different Spectral Attributes in Vowel Categorization: the Case of Udmurt Janne Savela author Stina Ojala author Olli Aaltonen author Tapio Salakoski author 2007-05 text Proceedings of the 16th Nordic Conference of Computational Linguistics (NODALIDA 2007) Joakim Nivre editor Heiki-Jaan Kaalep editor Kadri Muischnek editor Mare Koit editor University of Tartu, Estonia Tartu, Estonia conference publication savela-etal-2007-role https://aclanthology.org/W07-2462/ 2007-05 384 388