@inbook {4825,
	title = {Developing corpus interoperability for phonetic investigation of learner corpora },
	booktitle = {Automatic Treatment and Analysis of Learner Corpus Data},
	year = {2013},
	pages = {33-64},
	publisher = {Benjamins},
	organization = {Benjamins},
	address = {Amsterdam},
	author = {Nicolas Ballier and Philippe Martin}
}
