Alberto Barbosa Raposo Léo Pini Magalhães Ivan Luiz Marques Ricarte Hugo Fuks Coordination of Collaborative Activities: A Framework for the Definition of Tasks Interdependencies. 170-180 2001 conf/criwg/2001 CRIWG http://computer.org/proceedings/criwg/1351/13510170abs.htm db/conf/criwg/criwg2001.html#RaposoMRF01