@book { TheLinkbetweenNutritionPhysicalActivityandAcademicAchievement, title = "The Link between Nutrition, Physical Activity and Academic Achievement", author = "Sigrid {Quendler}", year = "2004", publisher = "Diplom.de", address = "Hamburg, Deutschland", doi = "10.3239/9783832483029", url = "https://m.diplom.de/document/223498" }