@TechReport{mlkit-4.3.0, author = {Mads Tofte and Lars Birkedal and Martin Elsman and Niels Hallenberg and Tommy H{\o}jfeld Olesen and Peter Sestoft}, title = {Programming with Regions in the {MLKit} (Revised for Version 4.3.0)}, institution = {IT University of Copenhagen, Denmark}, year = {2006}, month = {January} }