@conference{Gabbay.etal91,
author = "Gabbay, Dov and Kempson, Ruth and Pitt, Jeremy",
address = "Toulose, France",
booktitle = "Workshop on Non-Standard Queries and Non-Standard Answers",
pages = "155--185",
title = "{L}abelled abduction and relevance reasoning",
url = "http://www.dynamicsyntax.org/papers/GabbayEtAl-Abduction.pdf",
year = "1991",
}