Ohlsson, T. 2010. Scientific evidence base for transactional analysis in the year 2010 Annex 1 – the Big List: References to Transactional Analysis research 1963- 2010. International Journal of Transactional Analysis Research & Practice. 1, 1 (Jul. 2010), 12–23. DOI:https://doi.org/10.29044/v1i1p12.