Goeman, Ton; van de Velde, Hans (2001), "Co-occurrence constraints on /r/ and /ɣ/ in Dutch dialects", ใน van de Velde, Hans; van Hout, Roeland (บ.ก.), 'r-atics, Brussels: Etudes & Travaux, pp. 94–98, 101–102, ISSN0777-3692
worldcat.org
Goeman, Ton; van de Velde, Hans (2001), "Co-occurrence constraints on /r/ and /ɣ/ in Dutch dialects", ใน van de Velde, Hans; van Hout, Roeland (บ.ก.), 'r-atics, Brussels: Etudes & Travaux, pp. 94–98, 101–102, ISSN0777-3692