- Floor, L. (2004): Het getuigenis aangaande Jezus - een pneumatologische verkenning], in: Acta Theologica 24/2. S. 1-10.
- Gill, Clinton R. (1966): Hereby We Know: A Study in the Epistles of John (=Bible Study Textbook 45). Joplin.
- van der Merve, D.G. (2007): „Having fellowship with God“ according to 1 John: dealing with the intermediation and environment through which and in which it is costituted, in: Acta Theologica 27/2. S.