Ichiro Hasuo Chris Heunen Bart Jacobs Ana Sokolova Coalgebraic Components in a Many-Sorted Microcosm. 64-80 2009 CALCO http://dx.doi.org/10.1007/978-3-642-03741-2_6 conf/calco/2009 db/conf/calco/calco2009.html#HasuoHJS09