@article {10.3262/UW0901002, 
	author = "Hasselhorn, Marcus AND Watermann, Rainer AND Warwas, Jasmin",
	title = "Leistungsentwicklungen in Mathematik und Englisch im ersten Jahr an einem Fachgymnasium",
	journal = "Unterrichtswissenschaft",
	ISSN = "0340-4099",
	year = "2009",
	number = "1",
	pages = "2-16",
	doi = "10.3262/UW0901002",
	url = "https://content-select.com/index.php?id=bib_view&doi=10.3262%2FUW0901002",
	publisher = "Beltz Juventa",
	language = "",
}