Wolpaw J, Wood CC. Scalp distribution of human auditory evoked potentials. I. Evaluation of reference electrode sites. Electroencephalography and clinical neurophysiology [Internet]. 1982;54:15?24. http://www.ncbi.nlm.nih.gov/pubmed/6177514

Wood CC, Wolpaw J. Scalp distribution of human auditory evoked potentials. II. Evidence for overlapping sources and involvement of auditory cortex. Electroencephalography and clinical neurophysiology [Internet]. 1982;54:25?38. http://www.ncbi.nlm.nih.gov/pubmed/6177515