Stroop, Jan, 'Young Women’s Farewell to Standard
Dutch' : Paper Conference on Methods in Dialectology,
1-6 August 1999, St. John’s, Newfoundland, Canada
According to
figure 7-5 and 7-6 from A.C.M. Rietveld & V.J. van Heuven (1997),
Algemene Fonetiek, Coutinho, Bussum (with thanks to Vincent
van Heuven for composing this figure).