remain Modellierung von Lernwelten, Bd. 1: Theorie der Subjektiven Didaktik. SD-Verlag, Bahlingen 2002, ISBN 3-8311-3224-0. Klinkhardt-Verlag, Bad Heilbrunn 2004, ISBN 3-7815-1370-X. AOL-Verlag, Lichtenau 2002, ISBN 3-89111-330-7.
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