Fröschels, E. (1946). A peculiar intermediary state between waking and sleep. Journal of Clinical Psychopathology and Psychotherapy, 7, 825-833. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Fröschels, E. (1946). A peculiar intermediary state between waking and sleep. Journal of Clinical Psychopathology and Psychotherapy, 7, 825-833. [FULLTEXT]