José E. Gallardo Francisco Gutiérrez Blas C. Ruiz Inheritance and Selective Methods Dispatching in Concurrent Haskell. 33-46 1997 conf/plilp/1997 PLILP db/conf/plilp/plilp97.html#GallardoGR97 http://dx.doi.org/10.1007/BFb0033835