Chirkova & Chen (2013), pp. 365, 367–368. Chirkova, Katia; Chen, Yiya (2013), "Xumi, Part 1: Lower Xumi, the Variety of the Lower and Middle Reaches of the Shuiluo River", Journal of the International Phonetic Association, 43 (3): 363–379, doi:10.1017/S0025100313000157
Chirkova, Chen & Kocjančič Antolík (2013), pp. 382–383. Chirkova, Katia; Chen, Yiya; Kocjančič Antolík, Tanja (2013), "Xumi, Part 2: Upper Xumi, the Variety of the Upper Reaches of the Shuiluo River", Journal of the International Phonetic Association, 43 (3): 381–396, doi:10.1017/S0025100313000169
An example of a scholar disagreeing with this position is Scholtz (2009). On page 15, she provides a phoneme chart for Trøndersk, in which /ʎ/ is included. Under the phoneme chart she writes "Vanvik also lists /ʎ̥/ as an underlying phoneme, but that’s ridiculous." She provides no further explanation for that. Scholtz, Anna (2009), A phonetic study of the status of three mergers in the Trøndersk dialect of Norwegian(PDF), Williamstown, Massachusetts: Williams College