Paul Boersma (1997): "How we learn variation, optionality, and probability." Proceedings of the Institute of Phonetic Sciences 21: 43–58. University of Amsterdam.
Available from http://www.fon.hum.uva.nl/paul/. Equals chapter 15 of Boersma (1998).
A less correct version (demoting and promoting a single pair of constraints, instead of them all) is available as Rutgers Optimality Archive 221, http://ruccs.rutgers.edu/roa.html
© ppgb, December 19, 1998