- Author: Stefan Schmidt
- Language: German
- Year: 1991
- Author: Stefan Schmidt
- Language: German
- Year: 2009
- Author: Harald Walach (auth.) Harald Walach Stefan Schmidt Wayne B. Jonas (eds.)
- Language: English
- Year: 2011
- Author: Ingrid Kollak Stefan Schmidt
- Language: German
- Year: 2019
- Author: Ingrid Kollak Stefan Schmidt
- Language: German
- Year: 2019
- Author: Prof. Dr. Ingrid Kollak Diplom-Pflegewirt Stefan Schmidt M. Sc. (auth.)
- Language: German
- Year: 2016
- Author: Prof. Dr. Ingrid Kollak Stefan Schmidt (auth.)
- Language: German
- Year: 2015
- Author: Stefan Schmidt
- Language: German
- Year: 1991
