Márcio Eduardo Delamaro José Carlos Maldonado Interface Mutation: Assessing Testing Quality at Interprocedural Level. 78-86 1999 conf/sccc/1999 SCCC http://csdl.computer.org/comp/proceedings/sccc/1999/0296/00/02960078abs.htm db/conf/sccc/sccc1999.html#DelamaroM99