Olafsdottir , E., K. Hellsing, H. Steensland, R. Tenhunen, and A. Uldall. “Adding New Scopes to Traditional EQA Schemes Emphasizing Quality Improvement”. Upsala Journal of Medical Sciences, vol. 99, no. 3, July 1994, pp. 377-84, doi:10.3109/03009739409179382.