Guarded Methods Vs. Inheritance Anomaly: Inheritance Anomaly Solved by Nested Guarded Method Calls.

Szabolcs Ferenczi Guarded Methods Vs. Inheritance Anomaly: Inheritance Anomaly Solved by Nested Guarded Method Calls. 49-58 1995 30 SIGPLAN Notices 2 db/journals/sigplan/sigplan30.html#Ferenczi95