@book{90088,
	author = {Wittenweiler, Heinrich, active 15th century and Keller, Adelbert von,},
	title = {Der Ring},
	publisher = {Project Gutenberg,},
	year = {2015},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://de.wikipedia.org/wiki/Der_Ring_(Lehrgedicht)},
	url = {https://www.gutenberg.org/ebooks/49250}
}