@book { ProgressiveMuskelrelaxationEinKurskonzept, title = "Progressive Muskelrelaxation. Ein Kurskonzept", author = "Sven {Schmauder}", year = "2012", publisher = "GRIN Verlag", address = "München, Germany", doi = "10.3239/9783656295075", url = "https://www.hausarbeiten.de/document/203522" }