Gomez, S., Barnes-Holmes, D., & Luciano, M. C. (2002). Generalized break equivalence II: Contextual control over a generalized pattern of stimulus relations. The Psychological Record, 52, 203-220.
The authors, researchers at the university of Almeria and National University of Ireland, conducted a study that attempted to develop a procedure to produce a Generalized Break Equivalence Pattern. The results extent those found earlier and support he generalized operant nature of derived relational responding.