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05/08/2019 Hogrefe Publishing Group acquires assessment consulting company Formula 4 Leadership
01/21/2019ScienceOpen and Hogrefe Publishing Group extend their cooperation
09/17/2019 Open Science in Psychological Research: DGPs, Hogrefe and ZPID sign Partnership Agreement
01/18/2017Hogrefe Publishing Group acquires the market leaders for psychological tests in Spain and Portugal