Elvevåg, B., Fisher, J., Gurd, J., & Goldberg, T. (2002). Semantic clustering in verbal fluency: Schizophrenic patients versus control participants. Cambridge University Press.

Elvevåg, B., J. Fisher, J. Gurd, and T. Goldberg. Semantic Clustering in Verbal Fluency: Schizophrenic Patients Versus Control Participants. Cambridge University Press, 2002.

Elvevåg, B., et al. Semantic Clustering in Verbal Fluency: Schizophrenic Patients Versus Control Participants. Cambridge University Press, 2002.