@TechReport{mlkit-4.6.0, 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 4.6.0)}, institution = {Department of Computer Science, University of Copenhagen, Denmark}, year = {2021}, month = {December} }