@book {9783959871440, 
	title = "Research on Outdoor STEM Education in the digiTal Age",
	editor = "Ludwig, Matthias AND Simone, Jablonski AND Caldeira, Amélia AND Moura, Ana",
	isbn = "9783959871440",
	year = "2020",
	edition = "1",
	keywords = "Digitalisierung, Mathematikdidaktik, stem, MINT, Mathematics Education, mathcitymap, mathtrail, GeoGebra, outdoor mathematics, ROSETA",
	url = "http://www.content-select.com/index.php?id=bib_view&ean=9783959871440",
	url = "https://content-select.com/de/portal/media/view/621ce5f5-2824-4ebf-92f0-56f7b0dd2d03",
	publisher = "WTM-Verlag",
	language = "eng",
}