@book { ErnhrungsratgeberMagenundDarm, title = "Ernährungsratgeber Magen und Darm", author = "Sven-David {Müller-Nothmann} and Christiane {Weißenberger}", year = "2010", publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG", address = ", Deutschland", url = "https://schluetersche.openpublishing.com/document/403540" }